Schnapps (Sour) refers to a flavored liqueur with a fruit base, commonly used in cocktails to add a sweet yet tart element. Sour schnapps, such as apple, peach, or berry, often have a pronounced fruit flavor with an underlying sourness, making them excellent for balancing cocktails that might otherwise be overly sweet. They are particularly popular in fruity cocktail recipes or as a component in layered shots, where their vivid flavor and color can stand out. The sharp, refreshing taste of sour schnapps makes it ideal for summer drinks or festive cocktails that require a zesty touch.