A cocktail onion is a pearl, or other small round onion that is pickled in a brine solution. Some cocktail onions are homemade, and can be soaked in anything from [ingredient=dry-vermouth dry vermouth], sugar and vinegar, or salt and spices. 

A cocktail onion dfferentiates a Martini from a Gibson. 

Some popular cocktails containing Cocktail onion

  • Pirueta — Blanco tequila, Sotol, Celery bitters, Ancho Reyes Verde chile liqueur, Grenadine, Cocktail onion
  • Thymely Gibson Martini — Gin, Fleur de Thym, Bianco Vermouth, Cocktail onion
  • The Vegan Reuben — Gin, Aquavit, Dry vermouth, Bitters, Cocktail onion, Dill