Coffee Machine Espresso Espresso coffee is produced by pushing hot water under pressure through the grounds. There's a lot that goes behind the scenes to ensure the same quality of coffee. The most important elements are water temperature and pressure. A good espresso machine allows you to control these variables https://coffeee35685.ampedpages.com/watch-out-how-best-home-espresso-machine-is-taking-over-and-what-to-do-about-it-57097951