Can You Freeze Chopped Onion?
Yes, you can freeze it.
10-12 months
Texture softens — best for cooked dishes, not raw use, after thawing.
Chopped onion holds up notably well in the freezer for a cut vegetable — 10-12 months — though the texture softens considerably on thawing, which is exactly why frozen chopped onion works well stirred into a simmering soup or sauce but isn't a good stand-in for the crisp bite raw onion brings to a fresh salsa or salad. Freezing it in a flat layer before transferring to a bag keeps the pieces separate rather than fusing into one solid clump, making it easier to pour out just a small handful at a time as a recipe needs it.
There's no need to thaw chopped onion before cooking with it — it goes straight from the freezer into a hot pan for a soup base or a sauté, where the residual ice actually helps it release its moisture and soften quickly rather than getting in the way. A whole, unchopped onion is a poor candidate for this same shortcut, since its layers turn watery and separate unevenly through a freeze-thaw cycle in a way pre-chopped pieces, already broken down, don't suffer from as visibly. Chopping and freezing a large bag of onions in one sitting, right when they're fresh, is a genuinely useful bulk-prep habit specifically because onions are one of the few aromatics that lose so little practical usefulness in the freezer.
Storage times and safe temperatures are general guidance from USDA FoodKeeper, USDA FSIS, and FDA sources — they are not a guarantee of safety. When in doubt, throw it out. This is not a substitute for professional food-safety advice.
Source: USDA FoodKeeper data, checked 2026-07-12.