Buying an Espresso Coffee Machine Espresso machines heat water until near-boiling and then force it through tightly-packed ground coffee into portafilters under pressure. They also provide steam for drinks made from milk. Most espresso machines have programmable settings that allow you to alter the strength and size of the beverage. https://wwwcoffeeeuk08319.sharebyblog.com/29739694/5-laws-that-will-help-industry-leaders-in-best-ground-coffee-for-espresso-machine-industry