Which of the following is a requirement for proper layering in cocktails?

For proper layering in cocktails, using a bar spoon is crucial because it allows for a controlled and gentle pouring method that helps achieve distinct layers without mixing the ingredients. The design of a bar spoon—with its long handle and often a flat end—enables the bartender to pour over the back of the spoon, creating a barrier that helps the different liquids stay separate based on their density.

This technique is essential for drinks where visual appeal is a key component, as it allows each layer to remain intact, thereby showcasing the colors and textures of the different spirits or mixers. Mastering this skill is important in bartending, particularly when crafting visually stunning cocktails that align with customer expectations and enhance the overall drinking experience.