My coffee tastes bitter or sour
Typically, issues with crema or the flavor of the shot do not indicate a malfunction of the machine. Instead, this indicates that an adjustment needs to be made in the brewing process or that different beans need to be used.
- The video at the end of this article offers some helpful advice on tamping.
- Making adjustments to the grind is going to have the biggest impact on the coffee extraction. If it is too coarse, the coffee is going to come through too fast, and not extract long enough.
- If the grind is too fine, it is going to extract for too long, resulting in really bitter shots.
- It is important to use fresh beans, typically beans roasted within the past two weeks are best. Light and medium roasts are best for espresso brewing and richer crema.
Quick Tip: What is the Right Way to Tamp?