Cocktail D, also known as the “Dirty Martini”, is a popular cocktail that combines gin and dry vermouth with olive brine. The drink is created by stirring all of the ingredients together with cracked ice, then straining into a chilled glass.

Cocktail D is said to have originated at the Knickerbocker Hotel in New York City in the early 20th century. The drink was supposedly created as a way to use up leftover Gin and Vermouth from the hotel’s bar.…