Coffee or espresso is a popular ingredient in cocktails, offering a rich, robust flavor and a burst of caffeine. These ingredients can add depth and complexity to alcoholic beverages, particularly in drinks that benefit from their bitter and aromatic profile.

Espresso or coffee is commonly used in classic cocktails like the Espresso Martini or the Irish Coffee, where it complements the smoothness of vodka or the warmth of whiskey. It can also be used as a base in more innovative creations, where its intense flavor balances sweeter, creamier components.