What is crema made from?

Crema is the rich, golden layer that forms on the surface of espresso when it is brewed. It is primarily made up of oils and colloids released from the coffee grounds during the brewing process. These oils are emulsified with air and contribute to the flavor and aroma of the espresso, enhancing its overall quality and mouthfeel. The presence of this crema indicates that the espresso has been extracted properly, showcasing the interaction between the coffee’s natural oils and the water used in brewing.

While milk and foam can create a frothy texture in drinks like cappuccinos, they do not contribute to the crema found in espresso. Similarly, water and sugar do not provide the essential components for crema formation, and carbon dioxide and nitrogen do not play a role in its creation. Understanding these properties of crema helps to appreciate the complexity and artistry involved in crafting high-quality espresso.