The Hands-Down Best KahlĂșa Variety Delivers A Perfect Flavor Combo KahlĂșa Coffee-flavored cocktails have long been a favorite for many, but they're especially popular now thanks to the ubiquity of the espresso martini. And an absolute staple for that drink, as well as others in the coffee vein is, of course, KahlĂșa. It's classic, it's widely available, it's affordable, and it's delicious. There are so many different drinks to mix KahlĂșa into, from black Russians to spiked horchata.