Choosing the Best Ground Coffee For Your Espresso Machine If you have an espresso machine you will need to ensure that the coffee you grind is of the highest quality. This is because espresso machines require a fine grind for maximum extraction. Extraction happens when water passes through coffee grounds https://coffeee41931.blogdanica.com/29726063/the-top-coffee-espresso-machines-it-s-what-gurus-do-three-things