What is the purpose of a zester in bartending?

The function of a zester in bartending is primarily to create citrus peels for use as garnishes and flavoring agents. When zesting, the goal is to remove only the outermost layer of citrus peel, which contains aromatic oils that infuse drinks with bright, vibrant flavors. By using a zester, bartenders can add a burst of citrus aroma and flavor to cocktails, enhancing the overall drinking experience. This technique is crucial because it elevates the drink’s presentation and complexity, contributing to its appeal both visually and in taste.

The other options focus on tasks that do not relate directly to the purpose of a zester. Measuring liquid ingredients accurately pertains to the use of jiggers or measuring tools, shaking cocktails refers to the use of shakers, and stirring drinks involves using a bar spoon or similar tool. Each of these tools serves a different purpose in the bartending process, while the zester specifically targets the enhancement of flavor and aesthetics through citrus zest.