Buying an Espresso Coffee Machine Espresso machines heat water until 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. Most espresso machines have programmable settings to adjust the strength and the size of the beverage. https://wwwcoffeeeuk79363.rimmablog.com/29334048/from-all-over-the-web-the-20-most-amazing-infographics-about-best-ground-coffee-for-espresso-machine