Buying an Espresso Coffee Machine Espresso machines heat water until close to boiling, and then force it through tightly packed ground coffee into portafilter baskets under pressure. They also provide steam for drinks made from milk. Most espresso makers come with customizable settings for different sizes of drinks and strengths. https://coffeee-uk72401.webbuzzfeed.com/30327692/a-journey-back-in-time-how-people-talked-about-best-ground-coffee-for-espresso-machine-20-years-ago