What does "layering" refer to in cocktail making?

Layering in cocktail making specifically refers to the technique of carefully pouring liquids of different densities into a glass so that they create distinct layers. This method relies on the principle of density—lighter liquids, such as certain liqueurs, will float on top of heavier liquids, like cream or syrup. By pouring the ingredients slowly over the back of a spoon or at an angle, bartenders can achieve the visually appealing effect of separate layers, each with its own color and flavor. This technique not only enhances the aesthetic appeal of the drink but also offers a unique tasting experience as the flavors can be savored one layer at a time.

In contrast, simply mixing all ingredients together would result in a homogeneous mixture, losing the distinct layering effect. Shaking a cocktail with ice is a different mixing technique entirely, aimed at chilling and blending the ingredients rather than layering them. Adding garnishes, while important for presentation, does not relate to the layering process itself.