A cocktail onion is a pearl onion pickled in a brine which is designed to preserve its crunchy texture. Pearl onions are naturally sweet, which makes them an excellent pairing with many cocktails such as the Gibson.
Cocktail Onions

A cocktail onion is a pearl onion pickled in a brine which is designed to preserve its crunchy texture. Pearl onions are naturally sweet, which makes them an excellent pairing with many cocktails such as the Gibson.