Coffee Machine Espresso Espresso coffee is produced by forcing hot water under pressure through grounds. There are many things that go on behind the scenes to guarantee consistency in quality. The most important elements are water temperature and pressure. A good espresso machine will allow you to control these variables https://wwwcoffeeeuk07003.theobloggers.com/35961010/don-t-make-this-silly-mistake-you-re-using-your-best-home-espresso-machine