Benefits of an Espresso Machine In an espresso machine, hot water is forced at high pressure through finely grounded coffee beans. This results in a rich smooth drink that's called espresso. The first espresso machines were steam-driven. These machines utilize a single boiler to brew multiple drinks at a time. https://coffeee85867.theisblog.com/29982147/espresso-machine-explained-in-fewer-than-140-characters