Buying an Espresso Coffee Machine Espresso machines heat water to near boiling, and then force it under pressure to pass through tightly packed ground coffee in portafilters. They also provide steam for milk-based drinks. Most espresso machines have programmable settings to adjust the strength and the size of the beverage. https://wwwcoffeeeuk37791.blogproducer.com/36274930/ten-things-your-competitors-inform-you-about-best-ground-coffee-for-espresso-machine