Espresso requires coffee blending because a single coffee origin will lack the complexity required. It’s vital to note that the production of the crema is what gives espresso its edge over other brewing methods. Espresso would be a robust, thick coffee without the crema. An emulsified coating of small, smooth bubbles traps fragrant molecules in the crema. This layer coats the tongue, and as the little bubbles break down over time, espresso can be enjoyed even after it has been drinking. As a result, aromatic coffee is required for a properly made espresso blend.