What is the main difference between a latte and a cappuccino?

The main difference between a latte and a cappuccino lies in their milk foam content and preparation style. A latte typically consists of a larger volume of steamed milk combined with a small amount of milk foam on top, usually about 1/2 inch. This creates a creamy texture and allows the flavors of the espresso and milk to blend smoothly.

In contrast, a cappuccino typically features equal parts espresso, steamed milk, and milk foam, resulting in a much frothier drink. The foam on a cappuccino is generally thicker and more abundant, creating a layered effect where the foam sits prominently atop the drink. Therefore, the description in the correct answer highlights the significant difference in foam composition between the two beverages, emphasizing the cappuccino's distinctively higher foam presence.

The other options do not accurately reflect the characteristics and definitions of either drink. For example, lattes do have foam, but it is minimal compared to cappuccinos. Additionally, cappuccinos are served hot, not cold, and both drinks contain espresso as a fundamental ingredient.