Which ingredient is NOT part of a Cosmopolitan cocktail?

A Cosmopolitan cocktail, commonly known as a "Cosmo," traditionally includes specific ingredients that define its flavor and character. The classic components of a Cosmopolitan are vodka, triple sec, cranberry juice, and lime juice.

Peach schnapps is not part of this classic recipe. While peach schnapps is a popular ingredient in various cocktails, it does not contribute to the tart and slightly sweet balance that a Cosmopolitan is known for. The use of vodka as the primary spirit and the combination of the other three ingredients creates a distinct profile characterized by citrus and berry flavors, making it essential for any bartender or cocktail enthusiast to recognize what constitutes a Cosmopolitan and what does not.

Understanding this distinction helps in mastering cocktail recipes and also in mixing drinks accurately to meet customer expectations.