How Does Machine Espresso Work? The machine espresso is made using precision pressure, and filter technology that is awe-inspiring to create the coffee you love. What exactly is it? Espresso is made by pushing hot water under high pressure through finely-ground coffee. The process is similar to making drip coffee, https://www.coffeee.uk/products/gaggia-ri8423-espresso-machine-freestanding-manual-white