Buying an Espresso Coffee Machine Espresso machines heat water to near-boiling and then force it through tightly packed ground coffee into portafilter baskets under high pressure. They also supply steam for milk-based drinks. The majority of espresso machines are programmable settings to adjust the strength and volume of the beverage. https://wwwcoffeeeuk26205.creacionblog.com/29703609/best-ground-coffee-for-espresso-machine-explained-in-fewer-than-140-characters