Benefits of an Espresso Machine In an espresso machine hot water is forced under high pressure through finely ground coffee beans. This results in a smooth and rich drink known as espresso. The first espresso machines were powered by steam. These machines use one boiler to make multiple drinks simultaneously. https://coffeeeuk17946.oblogation.com/29328030/a-trip-back-in-time-what-people-said-about-espresso-machine-20-years-ago