Buying an Espresso Coffee Machine Espresso machines heat water to near boiling and then force it through tightly-packed ground coffee in portafilter baskets under high pressure. They can also be used to create milk-based drinks. The majority of espresso makers have customizable settings for different sizes of drinks and strengths. https://coffeee14613.iyublog.com/29343940/why-people-don-t-care-about-best-ground-coffee-for-espresso-machine