Buying an Espresso Coffee Machine Espresso machines heat water to near-boiling and then force it through tightly packed ground coffee into portafilters under high pressure. They can also be used to make milk-based drinks. Most espresso machines have programmable settings to adjust the strength and the size of the beverage. https://coffeee15094.blogrelation.com/35879042/7-simple-secrets-to-totally-making-a-statement-with-your-best-ground-coffee-for-espresso-machine