^ âeucatastropheâ (US) / âeucatastropheâ (UK) in Oxford Dictionaries, Oxford University Press.
For cooked onions, you can find one answer here: http://www.stilltasty.com/fooditems/index/17825. 1  3-5 days in the refrigerator. 2  refrigerate withing 2 hours of cooking. 3  refrigerate in covered container or wrap tightly with heavy-duty aluminum foil or plastic wrap.
Keeping most onions out of the fridge works, but here are a few caveats: 1  Cut onions DO need to be refrigerated. 2  Peeled onions DO need to be refrigerated. 3  Refrigerate sweet or mild onions that have a high water content. This will extend their shelf life.