What should be done after adding cold milk to the iced Macchiato?

After adding cold milk to the iced Macchiato, gently pouring espresso on top is the correct step to create the distinctive layers typical of this drink. In a traditional iced Macchiato, the cold milk forms a base, and the espresso, which is typically poured over the top, creates a 'mark' or 'stain' on the milk. This method not only enhances the visual presentation but also allows the flavors to blend gradually as the drink is consumed. The cold milk provides a creamy contrast to the rich, bold flavor of the espresso, making this layering technique crucial for the intended taste experience. This specific preparation helps to maintain the integrity of each component, ensuring that the coffee's natural flavors are highlighted without being fully mixed into the milk right away.