When should sugar or flavor be added in the process of making an iced Macchiato?

Adding sugar or flavoring before pouring the espresso is the recommended approach when making an iced Macchiato. This method ensures that the sugar or flavoring can dissolve more completely in the warm espresso before it is combined with the other ingredients. Since espresso is served hot, it has a higher temperature, allowing granulated sugar or syrup to blend more easily. This step is crucial because it enhances the overall flavor profile of the drink, providing a balanced taste right from the first sip.

In contrast, adding sugar after stirring or after adding milk may result in portions of the drink lacking flavor, as the sugar may not dissolve fully in the colder ingredients, or it could lead to uneven sweetness. Additionally, adding sugar after marking the cup doesn't serve to enhance the blending process and could disrupt the visual layering that is characteristic of a well-made iced Macchiato.