^ 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.
Onions can last for several weeks (if not months) without compromising their taste or nutritional value. However, you must be sure to store them in a cool, dry, well-ventilated place. Once you cut an onion, wrap whatever portion you donât use in plastic wrap, and put it in the refrigerator.