Is Freezing Onions Possible?

Onions are a fundamental ingredient in nearly every stew, sauce, and dinner recipe. Typically, they can be stored at cool temperatures (between 45 and 55 degrees) for several months. But if you need to keep them for a longer period, freezing onions might be an excellent solution.

But is it safe to freeze onions? Absolutely. Let's dive into the details of how to store this essential kitchen ingredient properly.

Is Freezing Onions Possible?

The simple answer: Yes, onions can be frozen. They will stay good for quite some time too. Typically, frozen onions will maintain their quality for about six months before starting to lose flavor, giving you plenty of time to use them before they begin to deteriorate.

How to Properly Freeze Onions

Onions are generally quite a tough vegetable, so they aren't too fragile to freeze. However, there are some key steps to follow when freezing onions to help preserve their flavor and maintain the overall quality of your fridge's contents.

Prepare Your Onions

Freezing whole onions is not ideal, as it involves blanching, freezing, and a slower thaw process, all of which can impact the onion's quality.

Your best option is to slice or dice the onions, depending on how you intend to use them later on.

Another option is to pre-cook the onions, including caramelizing them. If you make a batch of caramelized onions, you can freeze them for a quicker addition to your dishes when needed.

Prefreeze Your Onions

If you want to avoid your onions sticking together, take the extra step of spreading the slices or dices on a baking sheet and freezing them first, so they don't form a large clump in the freezer bag.

Wrap Your Onions Up

Whenever you freeze items, it’s important to wrap them well to keep air away from the surface and prevent freezer burn. For chopped or sliced onions, use freezer-safe plastic wrap or a zip bag, then place them in a second sealed container for extra protection.

Use Your Onions When You’re Ready

If your onions are chopped or sliced, there’s no need to thaw them before using them in your recipes.

How to Use Frozen Onions

Since freezing and thawing can alter the texture of onions, frozen onions are best suited for cooked dishes, such as stews, casseroles, or soups.

French Onion Soup Casserole

Caramelized onions bring an extra layer of flavor to a classic mac and cheese, elevating this creamy casserole. You can either use caramelized onions you've already frozen or caramelize fresh ones and freeze them after.

Caramelized Onion and Apple Tart

The sweetness of caramelized onions adds complexity to this apple tart. All you need is some crème fraîche and puff pastry to complete the dish.

Tofu Asada with Caramelized Onion Refried Beans

The rich, sweet flavor of caramelized onions enhances your refried beans in this delicious plant-based recipe.

Roast Beef and Onions

Cut your onions into quarters before freezing them to make this Sunday dinner special easier to prepare when the time comes.

Slow-Cooker Classic Beef Stew

A slow cooker is ideal for making hearty, slow-cooked dishes like this delicious beef stew. Using baby carrots can also save you some time during prep.

No-Knead Onion Rolls

These simple onion rolls become even more effortless when you have pre-chopped onions from the freezer ready to use.

Deeply Caramelized Onion Dip

Got a surplus of onions in the freezer? This delicious dip—perfect for pairing with chips or veggies—requires a whopping six cups of onions!