c. coffee liqueur

Coffee liqueur is a sweetened alcoholic beverage made by infusing or flavoring neutral spirits with coffee extract, beans, or concentrated coffee. The most internationally recognized example is Kahlúa, originating from Mexico in 1936, though coffee liqueurs are produced globally. The drink typically combines rum or vodka as its base spirit with coffee flavoring, sweeteners (usually sugar or corn syrup), and sometimes vanilla or other spice notes. The resulting liquid ranges from dark brown to black, with a viscous consistency and an alcohol content typically between 20-30% ABV. Coffee liqueurs may be produced through maceration of coffee beans in spirit, infusion of concentrated coffee extracts, or a combination of both methods.

Regional variations exist throughout coffee-producing nations, with notable examples including Tia Maria from Jamaica, which emphasizes rum as its base spirit, and various European interpretations that often incorporate additional flavoring elements such as chocolate or citrus.

Coffee liqueurs serve as both aperitifs and key ingredients in mixed drinks and dessert preparations. They are foundational to classics such as the White Russian (vodka, coffee liqueur, and cream), Black Russian (vodka and coffee liqueur), and Espresso Martini (vodka, coffee liqueur, and fresh espresso). Beyond cocktails, coffee liqueurs are employed in culinary applications including dessert sauces, tiramisu preparation, chocolate mousse flavoring, and as finishing drizzles for ice cream and baked goods. The ingredient's dual nature—both as a spirit and a flavoring agent—makes it versatile in both bar and kitchen applications.