Buying an Espresso Coffee Machine Espresso machines heat water to close to boiling, and then force it through tightly-packed ground coffee in portafilter baskets under pressure. They can also be used to make milk-based drinks. Most espresso makers come with adjustable settings for the size of the drink and strengths. https://www-coffeee-uk76523.p2blogs.com/29166047/5-laws-that-can-help-with-the-best-ground-coffee-for-espresso-machine-industry