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 pressure. They also supply steam for drinks made from milk. Most espresso makers come with adjustable settings for the size of the drink and strengths. https://coffeeeuk27628.ageeksblog.com/29147697/20-trailblazers-leading-the-way-in-best-ground-coffee-for-espresso-machine