Buying an Espresso Coffee Machine Espresso machines heat water to a temperature near boiling. They then push it under a high pressure through tightly packed ground coffee portafilters. They can also be used to make milk-based drinks. Most espresso machines have programmable settings that can alter the strength and volume https://coffeee31515.blogitright.com/29937096/best-ground-coffee-for-espresso-machine-explained-in-fewer-than-140-characters