Simple syrup, a common ingredient in many cocktails, is a liquid sweetener made by dissolving sugar in water. Its primary purpose is to add sweetness to a drink without the graininess that solid sugar can leave behind. The basic ratio for simple syrup is equal parts sugar and water, although variations exist depending on the desired sweetness and thickness.

In the context of cocktails, simple syrup is often used to balance the flavors, providing a smooth and consistent sweetness. Bartenders frequently use it in classic cocktails like the Mojito, Daiquiri, and Old Fashioned. Its neutral flavor makes it a versatile ingredient, easily blending with other components of a drink without altering the overall taste profile.