Webfollow this tutorial as professional barista leo schmidt show how different extraction results might look and what causes them—much of it comes down to grind size,. Webmaster the art and science of espresso. Learn bean selection, roasting, grinding, and extraction techniques to pull the perfect espresso shot every time. Webbaristas aim for an optimal brewing time to balance flavor and caffeine content, usually between 25 to 30 seconds for a perfect shot of espresso.
