Buying an Espresso Coffee Machine Espresso machines heat the water to close to boiling, and then force it under high pressure through tightly packed ground coffee in portafilters. They also provide steam for milk-based drinks. The majority of espresso makers have customizable settings for different sizes of drinks and strengths. https://coffeee31515.blogitright.com/29914862/don-t-make-this-silly-mistake-when-it-comes-to-your-best-ground-coffee-for-espresso-machine