Freezing onions isn't just a kitchen hack; it's a game changer. It's a convenient way to preserve this versatile ingredient and saves time with meal prep.
Peel and chop or slice onions to your desired size.
Spread the chopped onions in a single layer on a parchment-paper-lined sheet pan. Place the pan/cookie sheet in the freezer and leave it there for about 30 minutes (flash freeze) or until the onions are mostly frozen.
Transfer the onions to a freezer bag or freezer-safe container once the onions are frozen. Seal the plastic bags or containers tightly to remove as much air as possible and prevent air from entering.
Label and date the container and place it back into the freezer for long-term storage.
Notes
How to Flash Freeze OnionsSpread chopped onions in a single layer on a parchment paper-lined baking sheet. Freeze for about 30 minutes to an hour before transferring them to freezer bags or an airtight container.