What is a characteristic procedure when making an iced Macchiato?

Pouring espresso last is a characteristic procedure when making an iced Macchiato because it allows for the creation of the drink's signature layering effect. This method emphasizes the visual appeal of the beverage, where the espresso sits on top of the milk and ice, creating a distinct separation between the espresso and the other ingredients. This layering is not only aesthetic but also enhances the drinking experience, allowing the consumer to mix the espresso with the milk at their own preference as they sip.

In contrast, the other methods would not achieve the same visual or sensory experience. Stirring at every step could disrupt the layers and blend the ingredients too much, losing the intended presentation. Pouring espresso on the bottom would compromise the visual impact and alter the overall taste experience, as the flavors might not blend properly. Adding hot milk first would also defeat the purpose of an iced drink, as it would warm up the beverage and negate the refreshing quality that the iced elements provide. Thus, pouring espresso last is essential for crafting a proper iced Macchiato.