Coffee Machine Espresso Espresso coffee is made by pushing hot water under pressure through the grounds. There's a lot going on under the hood to deliver the same quality of coffee. The most important components are water temperature and pressure. A good espresso machine allows you to regulate these variables https://wwwcoffeeeuk87064.thelateblog.com/30318908/a-journey-back-in-time-what-people-said-about-best-home-espresso-machine-20-years-ago