Buying an Espresso Coffee Machine Espresso machines heat water to close to boiling, and then force it through tightly packed ground coffee into portafilters under pressure. They can also be used to create milk-based drinks. Most espresso makers come with adjustable settings for the size of the drink and strengths. https://www-coffeee-uk81117.blog-ezine.com/29903231/how-to-explain-best-ground-coffee-for-espresso-machine-to-your-mom