Choosing the Best Ground Coffee For Your Espresso Machine If you own an espresso machine, you'll need to ensure that your ground coffee is of top quality. This is because espresso machines require a fine grind to extract the highest amount of coffee. Extraction occurs when water flows through coffee https://wwwcoffeeeuk62513.alltdesign.com/what-is-coffee-espresso-machines-and-why-is-everyone-speakin-about-it-49611339