What is essential to add to the cup after marking it for an iced Macchiato?

When preparing an iced Macchiato, adding ice to the cup after marking it is crucial for several reasons. First and foremost, ice serves as the foundational element of the beverage, providing the necessary chill that distinguishes an iced drink from its hot counterparts. It also impacts the drink's overall texture and allows for the espresso and milk to be layered correctly.

Furthermore, the ice helps to preserve the intended flavor balance by keeping the drink cold, so it maintains its refreshing quality as it’s consumed. Without adding ice, the drink would not achieve its intended taste and experience, as the espresso and milk would be served at an unsuitable temperature.

While sweeteners, flavoring syrups, and espresso are important components of an iced Macchiato, the presence of ice is essential to fulfill the very definition of an "iced" beverage and to create the desired drinking experience.