Buying an Espresso Coffee Machine Espresso machines heat water until close to boiling, and then force it through tightly packed ground coffee in portafilter baskets under high pressure. They also provide steam for milk-based drinks. The majority of espresso makers have customizable settings for different sizes of drinks and strengths. https://coffeeeuk14716.blogscribble.com/29865975/5-clarifications-on-coffee-espresso-machine