Buying an Espresso Coffee Machine Espresso machines heat the water to close to boiling, and then force it under pressure to pass through tightly packed ground coffee in portafilters. They also provide steam for milk-based drinks. Most espresso makers come with customizable settings for different sizes of drinks and strengths. https://www-coffeee-uk51582.blogvivi.com/30391826/a-the-most-common-best-ground-coffee-for-espresso-machine-debate-doesn-t-have-to-be-as-black-or-white-as-you-think