Buying an Espresso Coffee Machine Espresso machines heat water to near boiling, and then force it under high pressure through tightly packed ground coffee into portafilters. They can also be used to make milk-based drinks. Most espresso machines have programmable settings to adjust the strength and volume of the beverage. https://coffeee-uk78281.fare-blog.com/29920139/what-you-should-be-focusing-on-improving-best-ground-coffee-for-espresso-machine