Coffee Machine Espresso Espresso coffee is produced by pushing hot water under pressure through grounds. There are many processes that take place behind the scenes to ensure the same quality of coffee. The main elements are water temperature and pressure. A good espresso machine allows you to regulate these variables https://coffeeeuk39639.thenerdsblog.com/35413022/the-3-greatest-moments-in-best-budget-espresso-machine-history