What does every macchiato include in addition to its regular components?

A macchiato is traditionally characterized by its layers and flavors, with a key component being a shot of espresso that serves as the base. The term "macchiato" itself means "stained" or "spotted" in Italian, which refers to the way the espresso is "stained" with a small amount of milk or foam. In a standard macchiato, you have the espresso as the primary element, and it is topped with a small amount of steamed milk or milk foam. The inclusion of a small shot of espresso is crucial because it defines the drink and contrasts with the other components, offering a strong coffee flavor that is balanced by the creaminess of the milk.

The other options do not accurately reflect the traditional components of a macchiato. Extra steamed milk is more characteristic of a latte, caramel syrup is typically used in flavored versions of drinks, and cold milk is not a standard component of a traditional macchiato, which is served hot with a key emphasis on the espresso. Thus, the inclusion of the small shot of espresso is what distinctly identifies a true macchiato.