Buying an Espresso Coffee Machine Espresso machines heat water to near-boiling and then force it through tightly packed ground coffee in portafilter baskets under high pressure. They can also be used to make milk-based drinks. The majority of espresso makers have customizable settings for different sizes of drinks and strengths. https://www-coffeee-uk84602.blogdun.com/30392118/the-most-common-best-ground-coffee-for-espresso-machine-debate-actually-isn-t-as-black-or-white-as-you-might-think