Onion rings are a form of appetizer or side dish commonly found in the United States, Canada, United Kingdom, Ireland, Australia, and some parts of Asia. They generally consist of a cross-sectional "ring" of onion (the circular structure of which lends itself well to this method of preparation) dipped in batter or bread crumbs and then deep fried; a variant is made with onion paste. Onion rings are sometimes accompanied by condiments including ketchup, mayonnaise or other sauces.
Whole onion rings make for better presentation through a variety of sizes, while those made from a paste offer quantity through consistent size. Consumers of whole onion rings run the risk of pulling the onion out of the batter if they fail to cut it all the way through with their teeth; onion rings made of onion paste break apart easily, while oil absorbency diminishes the onion taste.
The exact origins of the onion ring are unknown, but in 1933 a recipe for deep-fried onion rings that are dipped in milk then dredged in flour appeared in a Crisco advertisement in The New York Times Magazine.