Balsamic Caramelized Onion Crostini Recipe | Vegan in the Freezer (2024)

FAQs

Can you freeze caramelized onions? ›

Caramelized Onions Recipe Tips

Stored in an airtight container in the fridge, they'll keep for a week. You can also freeze them for up to two months. I like to freeze caramelized onions in ice cube trays. That way, I can easily thaw enough for a single dish and save the rest for another use.

The thing about cooking so many onions, though, is that you probably won't need that many at one time. So there's an essential second move whenever you're making caramelized onions: Freeze them. Stashed in an ice cube tray, caramelized onions will keep indefinitely in the freezer.

A muffin tin is far more appropriate: Just line the tin with plastic wrap, smoosh the onions down in there, then cover with another layer of plastic wrap and pop the whole tray in the freezer. Once they have set, remove the frozen onion pucks from the tin and store them in a freezer bag (in the freezer).

You can use either oil or butter to caramelize onions — but ideally, you use a combination of both! I like to use olive oil, and this cooking fat tolerates heat particularly well. Meanwhile, butter adds a distinctly rich flavor to the caramelized onions.

If you don't manage to eat all of your caramelized onions, you can store them easily. They'll keep in the fridge for up to four days. You can also freeze them for up to three months. Caramelized onions are so versatile that we're sure you can find lots of excuses to use them during that time.

Let the cooked onions thaw in the refrigerator overnight before adding to soups, pastas and braises, or using as a burger topping.

If that happens, don't despair; the good parts can be salvaged and turned into caramelized onions, which can be preserved in the fridge or freezer for use later. Sarah shows Danielle how to cut onions into uniform slices (and also the right way to dice onions), then cook them slowly in oil until they turn golden brown.

Not only do onions freeze exceptionally well, it truly is as easy as chopping them up and chucking them in the freezer. There is no need to cook them first, unless, of course, you'd like to be able to quickly add the depth of flavor that caramelized onions provide to a dish.

What's the best way to reheat caramelized onions? ›

Caramelized onions will keep for up to 5 days in an airtight container in the fridge. The fat will separate from the onions, but a quick reheat in the microwave or on low on the stove combined with a bit of stirring will revive the texture.