Buying an Espresso Coffee Machine Espresso machines heat water to near boiling, and then force it under pressure to pass through tightly packed ground coffee in portafilters. They can also be used to create milk-based drinks. Most espresso makers come with customizable settings for different sizes of drinks and strengths. https://coffeeeuk40654.blogacep.com/35002418/the-ultimate-glossary-of-terms-about-best-ground-coffee-for-espresso-machine