How Does Machine Espresso Work? The machine espresso makes use of precision pressure, and filter technology that is mind-blowing to create the coffee you enjoy. How exactly does it work? Espresso is produced by pushing hot water under pressure through finely-ground coffee. The process is similar to making drip coffee. https://www.coffeee.uk/products/espressoworks-barista-bundle-espresso-maker-with-grinder-cups