What type of garnish is used in a Cosmopolitan?

In a Cosmopolitan, the appropriate garnish is a lemon twist. This garnish is more than just decorative; it enhances the drink's flavor profile by adding a hint of citrus aroma that complements the drink's ingredients, which typically include vodka, triple sec, cranberry juice, and fresh lime juice. The brightness of the lemon twist provides a balance to the sweetness of the cranberry juice and the tartness of the lime, contributing to the overall refreshing taste of the cocktail.

When preparing a Cosmopolitan, bartenders often use the peel from a lemon, twisted over the drink to release its essential oils, which adds an aromatic touch that elevates the drinking experience. Other garnishes, like cherries, olives, or orange slices, are associated with different cocktails and would not provide the desired flavor harmony or visual appeal that a lemon twist brings to a Cosmopolitan. Thus, the lemon twist is the ideal choice for this specific cocktail.