Brown and Han say cut onions should be stored in the fridge, ideally around 40°F or below. Han recommends wrapping cut onions ...

For this reason, our Test Kitchen experts don’t recommend freezing whole onions or large chunks or wedges—and do recommend being savvy about how you use onions you’ve put on ice.

Aim for an absurd amount of caramelized onions, then freeze any that you don’t manage to consume in one sitting. Caramelized onions freeze beautifully, and you should take advantage of that.

If you like cooking with fresh onions, but frequently toss an unused portion, try freezing them!

The right way to store onions Whether they're whole, peeled, sliced, or cooked.

Blanch 3-4 minutes. Onions: Do not freeze onions as they change flavor during freezing. Potatoes: Potatoes don’t freeze well as they tend to become mealy. Radishes: do not freeze.

For this reason, our Test Kitchen experts don’t recommend freezing whole onions or large chunks or wedges—and do recommend being savvy about how you use onions you’ve put on ice.