Buying an Espresso Coffee Machine Espresso machines heat water to close to boiling and then force it under pressure to pass through tightly packed ground coffee into portafilters. They can also be used to make milk-based drinks. Most espresso makers include customizable settings for different sizes of drinks and strengths. https://coffeee88482.getblogs.net/62323594/from-around-the-web-the-20-most-amazing-infographics-about-best-ground-coffee-for-espresso-machine