What is the difference between a macchiato and a latte?

A macchiato is distinct from a latte primarily in the amount of milk used. In a macchiato, which translates to "stained" or "spotted" in Italian, espresso is the star of the drink, and it is typically topped with just a small amount of steamed milk or milk foam. This results in a much stronger coffee flavor because the milk content is minimal. In comparison, a latte consists of a larger volume of steamed milk combined with a shot of espresso, making it creamier and softer in flavor.

This fundamental difference in the milk content is what makes option C the correct answer. The macchiato's reduced milk quantity allows the espresso's robust flavors to shine through, contrasting with the latte's milky profile. Other options do not accurately capture the essence of the differences, as macchiatos can indeed be served hot or cold, they are not necessarily sweeter than lattes, and while some variations of macchiatos may have little to no milk, the core distinction lies in the quantity of milk compared to a latte.