When making a rainbow cocktail, what technique should be primarily employed?

The correct technique for making a rainbow cocktail is layering. This method involves carefully pouring each ingredient over the previous layer so that the different densities of the liquids allow them to remain separate and create a visually appealing gradient of colors. This technique is crucial in achieving the iconic look of the rainbow cocktail, as it emphasizes the distinct layers and their vibrant hues.

Using a spoon to guide the flow of the liquids or pouring slowly over the back of a cocktail spoon are common methods employed in layering to ensure that the liquids do not mix too much. This careful approach is key to maintaining the individual colors and the overall aesthetic of the cocktail.

The other techniques, such as muddling (which is typically used to blend ingredients such as fruits and herbs), shaking (which combines ingredients thoroughly), and stirring (which gently mixes the ingredients without aerating them), do not achieve the layered effect that the rainbow cocktail is known for. Each of these techniques serves specific purposes in cocktail preparation, but none are suitable for creating the beautiful, distinct layers characteristic of this particular drink.