Coffee Machine Espresso Espresso coffee is produced by pushing hot water under pressure through grounds. There's a lot going on under the hood to ensure consistent quality. Pressure and temperature of water are the two main elements. You can control these variables with a good espresso machine to ensure consistent https://coffeeeuk40654.blogacep.com/35018637/a-retrospective-the-conversations-people-had-about-best-home-espresso-machine-20-years-ago