Buying an Espresso Coffee Machine Espresso machines heat water to close to boiling, and then force it through tightly packed ground coffee into portafilters under pressure. They also provide steam for milk-based drinks. The majority of espresso machines are programmable settings to adjust the strength and size of the beverage. https://wwwcoffeeeuk94850.ampblogs.com/10-things-your-competition-can-inform-you-about-best-ground-coffee-for-espresso-machine-66624984