What is a key instruction regarding the espresso in an iced Macchiato?

In preparing an iced Macchiato, a key instruction is that the espresso must not be stirred after pouring. This method is integral to the drink's presentation and flavor profile. The espresso is poured over the milk, creating a layered effect where the espresso sits atop the milk. This layering allows customers to enjoy varying flavors with each sip, as the strong coffee taste gradually blends with the creamy milk.

Avoiding stirring after pouring ensures that the drink maintains its intended aesthetics and allows the individual to control how they experience the drink as they consume it. The visual appeal of the separated layers is one of the defining characteristics of a properly made iced Macchiato. By maintaining this structure, the beverage also maximizes the contrast between the smoothness of the milk and the boldness of the espresso.

In contrast, stirring would disrupt this balance and potentially dilute the flavors, diminishing the overall experience of the drink. Hence, this instruction is crucial for both the preparation and presentation of an iced Macchiato.