What is a common garnish used in whiskey cocktails?

A twist of citrus peel is a common garnish used in whiskey cocktails primarily because it enhances the drink's aroma and adds a refreshing citrus note that complements the flavors of the whiskey. The essential oils released from the peel provide a bright contrast to the rich, complex flavors of whiskey, making each sip more aromatic and enjoyable. This garnish is especially prevalent in classic cocktails like the Old Fashioned or Whiskey Sour, where the balance of flavors is crucial.

While other garnishes like a candied cherry may be used in specific drinks, they don't universally apply to whiskey cocktails. Olives are typically associated with gin or vodka drinks, and mint leaves are more common in certain cocktails, such as the Mint Julep. Thus, a twist of citrus peel stands out as a versatile and traditional choice that enhances the whiskey experience.