Coffee Machine Espresso Espresso coffee is produced by forcing hot water under pressure through grounds. There's a lot that goes behind the scenes to ensure consistent quality. The main factors are temperature of the water and pressure. You can regulate these variables using a high-quality espresso machine for consistent flavor https://coffeee-uk72401.webbuzzfeed.com/30365013/three-greatest-moments-in-best-budget-espresso-machine-history