Buying an Espresso Coffee Machine Espresso machines heat water to near-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 include programmable settings for drink sizes and strengths. They may also feature proportional-integral-derivative (PID) temperature https://coffeee41931.blogdanica.com/29763851/10-fundamentals-concerning-best-ground-coffee-for-espresso-machine-you-didn-t-learn-in-the-classroom