The Amaretto Sour is proof that a little indulgence goes a long way. This 1970s classic combines sweet, nutty amaretto liqueur with fresh lemon juice and a touch of simple syrup, creating a rich, velvety, and tangy-sweet balance. Want to take it up a notch? Add a splash of bourbon to deepen the flavor, or an egg white for a smooth, frothy finish. It’s dessert in a glass—but with a kick.