A Moscow mule is a cocktail made with vodka, spicy ginger beer, and lime juice, garnished with a slice or wedge of lime. It is a type of buck; therefore, sometimes called a vodka buck. Due to the popularity of the Moscow mule, other buck cocktails with different liquors have been labeled with the “mule” name in recent years. The Moscow Mule is a mid-century classic that was born in 1941 and helped contribute to vodka’s rise in America.