One defining characteristic of a properly brewed espresso is its crema, the finely textured, hazelnut-colored foam produced when coffee bean oils emulsify with air and water under high pressure.
When it comes to performance, our independent lab tests have shown that not all bean-to-cup coffee machines live up to their high prices either, so read our reviews and choose a Which? Best Buy. See ...
consistent and convenient brews How we test espresso machines To gauge a machine's performance, we spent dozens of hours grinding and pulling shots from more than 10 pounds of fresh coffee beans.