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5 Ways to preserve onions for pantry storage. Details on how to freeze onions, dehydrate onions, and turn onions into onion powder.
Onions are a vegetable that is often taken for granted. They are easy to get in the supermarket and are relatively inexpensive as far as produce goes. Most meals contain onions in some form, whether they are chopped, sauteed, or added as powder.
In this article, we’ll discuss the different types of onion and their uses, then how to preserve them for extended pantry storage. You might be thinking that onions already last a long time in the counter, so there is no reason to go to the trouble of preserving them.
Nothing could be farther from the truth. When you take the time to freeze, dehydrate and use onions in preserves, you will create many ways to use them year round and preserve them at their peak.
Preserving onions is certainly worth the effort!
Types of Onions
White Onions
White Onions are the mildest onions, and if you are so inclined, the best for eating fresh. To take away any onion bite, slice them thinly and soak them in cold water for an hour. They will mellow and be on the sweet side, perfect for eating fresh in salads.
The instructions to preserve white onions by dehydrating, freezing, or cold storage are later in this article.
Yellow Onions
Usually called Spanish onions, these are the best onions for caramelizing. They have a sharper flavor than the other onions.
See below for ideas on how to preserve yellow onions by dehydrating, freezing, or cold storage.
Red Onions
Best for grilling, these provide a nice color variety and have a sharp flavor that is higher than the white onion. Red onions also have a lower glycemic index than other bulb onions.
See below for ideas to preserve red onions by dehydrating, freezing, or cold storage.
Sweet Onions
Sweet onions are technically a white onion, but they have higher sugar content than regular white onions. Each area of the USA has its own variety. Look for names like Walla Walla Sweet, Vidalia, and Maui.
Continue on to get instructions on how to preserve sweet onions by canning, freezing, and dehydrating.
Green Onions (Scallions)
Bunching onions can be planted separately from seed, but are often picked from the other onions listed above when they are at the immature stage, before bulbing starts. These are best used fresh in salad, but can also be cooked and used in eggs and oriental dishes.
View this article at The Purposeful Pantry for details on how to preserve green onions by dehydrating. You can also freeze green onions or store them in the refrigerator for up to 2 weeks.
How to Store Onion Bulbs in the Pantry
Keep onions whole for easy pantry storage. White, yellow, and red, raw onions can be kept in the regular pantry for 2 to 3 months. The key is to use a cool, dark area that is warmer than the refrigerator, but not room temperature. (somewhere between 45-55° F works best).
Create a root cellar area in your basement or in an unheated closed that is not frequently used. Use the mesh bag that the onions came in, a paper bag, or store them loosely in a basket. Do not keep them in plastic bags, which reduce airflow and will lead to premature molding.
Treat Sweet Onion Bulbs Differently
Sweet onions are fragile, bruise easily, and do not last long in storage. If you plan to use them within a week or so, you can leave them out on the counter. For extended storage look for a place in your pantry that will give you the space to keep your sweet onions cool, dry and separated.
Separate sweet onions by wrapping each onion individually in paper towels and then placing them in a brown paper bag in the refrigerator. This simple storage method will keep them for up to a month.
There are three other options to overcome this short storage time for sweet onions.
- use the canning method and turn them into onion relish (see the recipe below)
- dehydrating chopped pieces
- freeze a portion for later use
Look for sweet onions on sale during these times: [source]
- Maui: In seasonMay through December. Smaller than other sweets.
- OSO Sweet: From Peru. AvailableJanuary through March. Very high in sugars. Often found at Costco during the season.
- Texas Sweet (in the South): Two kinds: Spring Sweets and Texas 1015 Super-Sweets (the number refers to the optimal planting date, October 15). AvailableMarch through June.
- Vidalia (grown in George, available in the south): In seasonApril through Junebut available into the fall.
- Walla Walla (in the Pacific NW): AvailableJune to August.
Each area of the country has its own specialty sweet onion, but as a general rule, in most parts of the USA, sweet onions are in season from March to August.
Freezing Onions in Small Batches
If you happen to get a windfall of onions or grow your own, freezing is another option for preserving them. The good news is that it is not necessary to blanch onions before freezing them, so the process is simple.
As an alternative, you could freeze them in sheets and then break off sections as you need it for cooking projects.
Just chop the onions and place them into portion size freezer bags. I put mine into one cup portions, which makes it easy to remove a bag from the freezer and add it directly to a recipe.
Chopping tip: Are you an onion crier? I use a version of this handy chopper (Amazon). It contains the juices that cause you to cry during chopping and lets you dice a large volume of vegetables without knowing knife skills.
Another way to keep from crying is to leave the end with the roots intact. You can see how I did that in the picture with the white onions.
I also pack mine in one tablespoon portions in ice cube trays. These are great for quick sauteing recipes. Fill the cube sections with chopped onion, add a bit of filtered water to help the onions stick together and freeze. Once the cubes are hard, remove them from the tray and store them in a freezer-safe zip-top bag or plastic tub.
Frozen onions do not have a long shelf life (6 to 8 months tops), so you might want to consider processing them for the freezer once your cold storage onions are looking a bit worn.
Another thing to consider is the texture. Once the onion is frozen, it will no longer be crisp when thawed. That means they are best used for sautéing or in soups.
Dehydrate Onions
This process can be used on any type of onion, including green bunching onions. To prepare, remove the papery outer coverings of the onion bulbs and compost them, or set them aside for making a vegetable broth.
Cut the remaining onion into quarter-inch dices. You don’t have to be exact about it.
Cover your dehydrator trays with parchment paper or tray liners. While the pieces seem too big to fit through the holes now, they will shrink during the drying process and fall to the tray below without a liner.
Once you are done with the cutting, lay them out in single layers on your dehydrator trays.
Dehydrate at 135°F for 8 to 10 hours. Dehydrating times are only estimates.Your time will vary by the amount of humidity in your house and by how much you load the trays with food. Giving the trays more room for air circulation will speed up the process.
NOTE: Dehydrating onions is a smelly business and everyone in your house will definitely know what you are doing. If you have grumbly family members and a garage or other protected area, you might consider doing your drying outdoors.
You’ll know your onion dices are dehydrated when they are very crisp and will click on the countertop when dropped. No amount of moisture will be seen when you pinch a piece open.
Store the dehydrated onion pieces canning jars with tight-fitting lids, or place them in FoodSaver bags. Whichever method you choose for storage, make sure the pieces are completely dry. Store them in a cool, dark place – your pantry shelves are perfect.
How to Make Onion Powder at Home
Once your onions are dehydrated, run them through a blender, coffee grinder or food processor and turn it all into powder. If your blender does not powder all the pieces, use a wire mesh strainer to sift out the larger pieces and run them through again. I use this coffee grinder (Amazon) and it never gets the whole batch into powder, so I leave some of the onion as dried minced onions and use it in recipes that do not need powder.
You can use onion powder as is or mix it with sea salt. We keep both kinds in our spice cabinet. This process also works with herbs and vegetables.
Spicy Pickled Sweet Onion Relish
[yield 3.5 cups]
This onion relish is tasty on hamburgers and hotdogs. You can increase the amount of sugar (up to one cup) if you like a sweeter relish. Try mixing various kinds of bulbing onion for a different flavor.
Ingredients
- 10 cups chopped sweet onions (about 7-8 medium-sized onions)
- 2 1/4 cups white vinegar
- 1/2 cup sugar
- 2 tablespoons celery seed
- 2 tablespoons kosher salt
- 1 teaspoon crushed red pepper
Directions
- Combine all ingredients in a non-reactive pan and bring to a boil.
- Reduce heat and simmer for 10 min.
- Ladle the relish into clean hot half-pint jars with 1/2 in head-space.
- Wipe the rims, cap the jars, and loosely seal.
- Process sweet and spicy onion relish in a water bath canner for 10 minutes.
Let the jars sit for two weeks before using; this gives the onion time to age and mellow.
Use one of these five methods for preserving onions. You’ll be glad you have some on hand in different forms – from fresh, to dried, to frozen. There’s a use for all of them in your kitchen pantry.
This post is part of the blogger collaborative Preserving the Harvest.
Do you love preserving the harvest as much as we do? Click the links below and get detailed instructions for preserving 23 of the most popular fruits and vegetables
Preserving Vegetables (in alphabetical order)
How to Preserve Carrots by Freezing, Canning, and More from Oak Hill Homestead
4 Easy Ways to Preserve Cauliflower from Dehydrating Made Easy
Cucumber Fresh Pack Garlic Dill Pickles Recipe from The Self Sufficient HomeAcre
Make Your Own Garlic Powder and Other Ways to Preserve Garlic from Learning & Yearning
How to Freeze Your Green Bean Harvest from The Reid Homestead
How to Preserve Leafy Greens from Homespun Seasonal Living
Preserving Okra by Freezing, Canning, Fermenting, and Dehydrating from Schneider Peeps
5 Ways to Preserve Onions for Storage from Rockin W Homestead (THIS POST)
How to Dehydrate Parsnips & Make Parsnip Chips from The Purposeful Pantry
3 Ways to Preserve Peppers from Grow a Good Life
5 Ways to Store Potatoes from A Modern Homestead
Ways to Preserve Radishes from The Purposeful Pantry
How to Freeze Squash (and Other Preservation Methods) from Our Inspired Roots
Freezing Tomatoes for Preserving Later in the Year from Stone Family Farmstead
3 Easy Ways to Preserve Zucchini from Grow a Good Life
Preserving Fruit (in alphabetical order)
Guide to Preserving Apples from Oak Hill Homestead
3 Ways To Preserve Fresh Summer Berries from Better Hens & Gardens
How to Make Cherry Jam from Scratch from The Self Sufficient HomeAcre
3 Quick Ways to Preserve Grapes from Homestead Lady
3 Best Ways To Preserve Mulberries from My Homestead Life
How To Preserve Oranges On The Homestead from 15 Acre Homestead
How to Freeze Peaches from A Modern Homestead
How To Preserve Strawberries On The Homestead from 15 Acre Homestead
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FAQs
How do you store onions at Homestead? ›
Onions prefer cool dry conditions for long-term storage. A kitchen is likely a bit too warm and too humid for onions to stay good for too long, therefore you only want to bring up as many as you're going to use within a week or so and leave the rest in storage.
What are the ways of preserving onions? ›Garlic or onions should be hung in a dark, warm room (70-75°F) with good air circulation. Bulbs should dry evenly without spoiling within two to three weeks. Completely dry garlic or onions should be stored in a dry, dark, cool (60-65°F), well-ventilated space in well-ventilated containers for 3 to 5 months.
What are the simplest method of preserve and storing onion? ›There are three simple ways to preserve onions. You can cure and store them whole; dehydrate them; or freeze them.
Can you can onions to preserve them? ›Onions can be preserved by drying, freezing, or canning; and preserved onions can be used in a variety of dishes! Drying onions is easier than it may initially sound. Simply wash the onions, and peel off the outer "paper" layers. Cut off the ends of the onions, and slice into 1/8- to 1/4-inch slices.
How do you preserve onions from the garden? ›Curing Onions
In order to store onions you'll need to 'cure' them, which simply means drying the outer skins fully. To do this, move your onions under cover. You can dry onions on racks or on layers of newspaper in a greenhouse, hoop house or cold frame. This also works for other alliums such as shallots and garlic.
5 Ways to Store Onions for Long Term (Weeks, Months, or 1 Year) CiCi Li
What is the best way to preserve green onions? ›You'll get the most life out of the green onions if you place the root end in a glass or jar with 1-2 inches of water. Placing a loose plastic bag (like a produce bag from the grocery store) over the tops will also help reduce evaporation from the high amount of air circulating through the refrigerator.
How do farmers store onions? ›Store onions somewhere cool, dry, well-ventilated, and out of direct sunlight, for instance in a garage or unheated room. Don't store any bulbs that are soft or have thick necks – use these fresh as soon as possible instead.
How do you preserve peeled onions? ›According to National Onion Association, never store peeled onions in plastic bags as the lack of air movement will reduce their storage life. The best way to store peeled onions is to wrap each onion in a paper towel and place them in refrigerator to keep them cool and dry.
What is the best way to store potatoes and onions? ›What you don't want is to have your potatoes and onions in close proximity, as gases from the onions can hasten sprouting in potatoes. Kept in the dark: Davison says your potatoes should be stored inside a paper bag in a cool, dark, dry place. And as mentioned above, away from onions and their sprout-encouraging gases.
Can you preserve onions in oil? ›
Pour oil over onions, tossing to coat, letting them soften in the dish- this makes it easier to then pack in jars, if desired. After they are slightly cooled, store in glass jars or containers; onions will keep up to over a week in the refrigerator, longer if properly canned.
How do you preserve onion juice without refrigeration? ›ONION JUICE STORE, PRESERVE AND REUSE FOR HAIR GROWTH
Can you preserve red onions? ›Preserving pickled red onions is pretty straightforward. You simply slice the onions, heat a simple vinegar brine, fill the jars, and process in a water bath canner for shelf stable jars. This canning recipe is based on the “Vinegared Red Onions” from the Ball Blue Book Guide to Preserving.
How do you preserve sweet onions? ›When storing sweet onions, it's important to keep them cool, dry and separate. Place in a single layer, wrapped separately in foil or paper towels, in the vegetable bin of the refrigerator. If it is not possible to store them in the refrigerator, store them in the coolest area of your home with good air circulation.
How do you keep onions and garlic fresh? ›Place onion and garlic in separate mesh bags or a clean and dry wooden bin or waxed box. Don't wash your onions or garlic before you store them. Keep them very dry. While in Storage Check and cull them often to make sure the onions and garlic are not sprouting or developing soft spots.
How long can you store onions from Garden? ›A good storage onion stored properly will retain its eating quality for 10 to 12 months. For best results, onions should be stored in a dark, cool space (35 to 40 degrees F) like a cellar, garage or shed.
How long can you store onions? ›Here are some tips for storing onions: Whole, raw onions will last two to three months when stored in a cool, dry place. Places that provide these conditions could include a cellar, pantry, or unheated basement. But onions can only last in the fridge for up to two weeks.
How do you treat onions for long term storage? ›Plastic milk and storage crates are great for curing onions. You can turn them upside down and put the onions on top to further increase air circulation. If you don't have something elevated to place them on, you can also lay them out on newspaper or even hang them in small bunches to cure.
How can we store onions for long time in India? ›02/7Keep them dry
Yes, the first rule to store onions is to keep them in a clean, dry place. Especially, when you want to store it for a long period of time. Moreover, storing onions in a dry place with good ventilation is the key to retain their freshness and increase their shelf life.
Freeze onions using one of the following methods: Dry Pack - Pour onions in freezer bags. Placing packages flat in the freezer helps the onions to freeze faster and makes it easier to break off sections as needed. Express out the air and place bags on cookie sheets or metal pans until onions are frozen.
How do you store onions for 6 month old? ›
How to Store Onions for 6 Months - YouTube
How do you store green onions in the freezer? ›Green onions adapt well to flash freezing. Place the chopped portions on a parchment-lined tray, pop it in the freezer, and when frozen, stash the onions in freezer containers or bags.
How do you store green onions in water? ›To keep whole green onions fresh in the fridge, treat the onions like flowers: add water to a jar, then place the green onions root-side down in the water, cover with a bag and secure the bag with a rubber-band. Just change out the water every few days.
How are onions stored in us? ›Store onions in a cool, dry, well-ventilated area. Maintain storage temperature of 45-55°F. Do not wrap onions in plastic or store in plastic bags. A lack of air circulation will reduce shelf life.
Where are onions stored? ›Whole onions and shallots are best stored in a cool, dry, dark and well-ventilated room. Ideal places include the pantry, cellar, basement or garage. Peeled onions can be stored in the fridge for 10–14 days, while sliced or cut onions can be refrigerated for 7–10 days.
What are storage onions? ›Most storage onions are long-day varieties, meaning they require 14 hours or more of sunlight to grow properly. Because of this, they are best suited to being grown in northern states. If you live in the south, choose a short-day variety, like Red Bull. You'll be much happier with the results.
Can we store onions in fridge? ›Second, the onion absorbs the moisture from its humid surroundings, which also results in an unpleasant softening in texture. However, once an onion has been cut, store it in the refrigerator in an airtight container—preferably a glass one, as plastic absorbs odors.
How do you store onions in the fridge without the smell? ›The fridge is a cold and humid environment, which can cause onions to soften and spoil. The best place to keep whole onions is somewhere dark, cool, dry, and well-ventilated. A perforated basket or bin in a kitchen cupboard checks all the boxes and would be an ideal location in which to store onions.
How long do chopped onions last in the freezer? ›Shelf Life Tips
Properly stored, frozen chopped onions will maintain best quality for about 12 months in the freezer, although they will usually remain safe to eat after that.
Potatoes need airflow to prevent the accumulation of moisture, which can lead to spoilage. The best way to allow free circulation of air is to store them in an open bowl or paper bag. Do not store them in a sealed container without ventilation, such as a zipped plastic bag or lidded glassware.
How do you store onions and potatoes in a small kitchen? ›
The Best Way to Store Potatoes and Onions, According to Rach - YouTube
How do you store onions garlic and potatoes? ›Onions and garlic are also best stored in cool, dark environments, but it's also important the storage place is also a dry environment. Both are “cured” prior to being sold in grocery stores. This curing process removes moisture from the outer layer of the skin.
How long does onion last in oil? ›Allow the oil to cool to room temperature. Set the fried onions aside to cool. Pour the cooled oil into a sterilized glass jar and close tightly. The oil will keep at room temperature for 1 week or refrigerated for up to 3 months.
Is olive oil a preservative? ›Olive oil is a natural preservative that prevents spoilage by isolating the food from air, providing a seal that can delay oxidation, deterioration and molding.
How do you preserve vegetables for a long time? ›How To Keep Vegetables Fresh For Long? | Vegetable Storage Tips
How long can I preserve onion juice? ›It is better to make a fresh batch of onion juice/ pulp or oil every time you are using the product. While you can store onion juice for 4-5 days in a refrigerator, its odor tends to worsen with time.
How do you preserve juice for a long time? ›Your juice can be stored in its airtight container in the fridge for 24 - 48 hours and up to 72 hours at the absolute most. If you need to store juices longer than that we suggest you freeze them. However, if freezing them, it is then advisable to thaw in the refrigerator and drink immediately.
How long can I store onion in fridge? ›Store cut onions in the refrigerator (or even the freezer)… You can hang on to a halved or sliced onion in an airtight container in the fridge for about one week. Store them in an airtight container (preferably a glass one, as plastic will absorb odor) to decrease oxidation, moisture absorption, and stinkiness.
How do you dry onions? ›Drying and Storing Onion Bulbs
To dry onions, spread them out on a clean and dry surface in a well-ventilated location, such as a garage or a shed. Onions should be cured for at least two to three weeks or until the tops necks are completely dry and the outer skin on the onion becomes slightly crisp.
Caramelized Onions - Water-Bath Canning - YouTube
What can I do with too much onions? ›
Keep them in the fridge all week and add them to your meats, or pizzas, or casseroles. Make an Onion Soup out of them. Take a couple and pickle them to add to other foods, such as tacos, burgers and salads. And, you CAN freeze them for up to six months.
Can you wrap onion in foil? ›Making the best grilled onions has never been easier! Wrap sliced Vidalia onions in a foil packet and grill until tender. Enjoy caramelized onions on top of burgers, cauliflower steaks, grilled vegetables, and so much more!
How do you store strawberries and onions? ›Harvesting and Storing Onions - YouTube
How do you preserve fresh garlic? ›Instead, store both hardneck and softneck garlic bulbs in a cool, dry, well- ventilated place in well-ventilated containers such as mesh bags. Storage life is 3 to 5 months under cool (60°F, or 16°C), dry, dark conditions. When stored too long the garlic cloves may shrivel or begin to sprout.
What is the best way to store fresh garlic? ›Just store in a cool (60 to 65 degrees), dimly lit place with air circulation. You don't want to put your garlic in an airtight container or it will begin to rot. Plastic bags are no good either—they'll trap moisture, which makes garlic rot faster. Reach for mesh bags or paper wrappers, instead.
What is the best way to store spring onions? ›They contain more moisture than mature onions, so keeping them out at room temperature for longer than a couple of days could cause them to mold. Keep them in the crisper drawer, sealed well in a plastic bag, and they'll stay fresh for about two weeks.
How do you store onions from the farmers market? ›Stored in a cool, dry, and well-ventilated place, onions will keep for a month or so. Keep fresh garlic in an open container (away from other foods) in a cool, dark place. Unbroken bulbs can be kept up to eight weeks.
How long do onions need to dry after harvesting? ›Spread out the onions in a single layer on a clean, dry surface. Cure the onions for two to three weeks until the onion tops and necks are thoroughly dry and the outer bulb scales begin to rustle. After the onions are properly cured, cut off the tops about one inch above the bulbs.
Should I wash onions before storing? ›Don't wash your onions or garlic before you store them. Keep them very dry. While in Storage Check and cull them often to make sure the onions and garlic are not sprouting or developing soft spots. Remove and eat any damaged bulbs.
Can you freeze whole onions? ›You can freeze onions with or without blanching. You must blanch when freezing whole onion bulbs. Use a blanching time of three minutes for small onions, seven minutes for larger. For safe freezing, blanching must heat onions all the way to the center of the bulb.
What is the best way to store potatoes and onions? ›
What you don't want is to have your potatoes and onions in close proximity, as gases from the onions can hasten sprouting in potatoes. Kept in the dark: Davison says your potatoes should be stored inside a paper bag in a cool, dark, dry place. And as mentioned above, away from onions and their sprout-encouraging gases.
What is the proper way to store produce? ›Most vegetables, like carrots, potatoes, broccoli, cabbage and celery should be stored in a plastic bag or container in the crisper of your fridge. Mushrooms are best stored in a paper bag. Vegetables should be stored in a different part of the fridge than fruit. This will prevent them from ripening too fast.
How long can you store onions? ›Ideal places include the pantry, cellar, basement or garage. Peeled onions can be stored in the fridge for 10–14 days, while sliced or cut onions can be refrigerated for 7–10 days. To keep them even longer, freeze them in a resealable bag or airtight container.
What is the best way to dry onions? ›Drying and Storing Onion Bulbs
To dry onions, spread them out on a clean and dry surface in a well-ventilated location, such as a garage or a shed. Onions should be cured for at least two to three weeks or until the tops necks are completely dry and the outer skin on the onion becomes slightly crisp.
Store in a cold, dry, dark place
Keeping them out of direct light or even better in the dark also helps them last longer. Onions should be stored in temperatures between 35 and 50 degrees Fahrenheit (2 to 10 Celsius). The optimal storage is 35 to 40.
Curing Onions for Long Term Storage
So, they are cured first. Allow clean bulbs to dry in the sun. Spread onions out on a flat surface, in full sun. Allow them to dry in the sun for a few days until the onion roots and the plant itself is a dry, brown.
A wire basket in a pantry or lower cabinet is also a good choice. Although you will need to rotate the onions to ensure they stay dry if you plan to store them for long periods of time. If you use onions a lot or tend to stock up on them at the farmers market, you may want to consider freezing them.
How do you clean fresh onions? ›Brush off excess dirt from the onion bulbs and roots with your fingers. When the leaves are dry down to the bulbs, wipe pruning shear blades with rubbing alcohol, and trim the leaves to 1 inch above the bulbs, unless you intend to braid the leaves. In hot, dry weather drying normally takes about four days.
How do you store onions and garlic long term? ›Store filled bags in cool, dark place, so that air can circulate between the bags. This punched paper bag method should extend the life of onions, garlic, and shallots in most situations. However, their specific life may vary depending on the temperature, humidity, and light conditions where the bags are stored.
Can you preserve onions in olive oil? ›Pour oil over onions, tossing to coat, letting them soften in the dish- this makes it easier to then pack in jars, if desired. After they are slightly cooled, store in glass jars or containers; onions will keep up to over a week in the refrigerator, longer if properly canned.
How do you freeze onions long term? ›
- Chop Onions. Dice onions to your preferred size – where in slices or small cubes. ...
- Place in Freezer Bag. The key to freezing onions is to seal them well in a high quality bag or container that will prevent any odor. ...
- Seal and Freeze. Finally, seal and freeze for up to three months.
Keep them in the fridge all week and add them to your meats, or pizzas, or casseroles. Make an Onion Soup out of them. Take a couple and pickle them to add to other foods, such as tacos, burgers and salads. And, you CAN freeze them for up to six months.