My Coffee Tastes Bitter or Sour, and Lacks Crema
If you're trying to use your Gaggia Classic Pro, but all of your shots or coffee tastes bad, bitter, or sour, or has developed little to no crema, keep reading to learn more.
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 following videos review the different variables and offer solutions:
- US: Tamping The Correct Way / CA: Tamping The Correct Way
- US: The Effects Of Tamping Pressure / CA: The Effects Of Tamping Pressure
- US: Grinding Coffee For Espresso / CA: Grinding Coffee For Espresso
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. Storing beans properly is also important. More information can be found here (CA visitors, click here).
If the behavior persists after reviewing these factors then the machine may need to be cleaned. Lack of cleaning can cause burned or bitter flavors, or create flow issues which can result in a weak shot.