Cocoa beans var. Forastero were obtained from PTPN VII, Rajamandala, West Java, Indonesia. 16 gram of cocoa beans were used in each 50 mL Erlenmeyer fermentor. The fermentation process was performed to mimic the real cocoa bean fermentation in the plantation following Stoll [6], with some modification. For example the fermentation temperature was controlled as such to follow the increasing temperature profile of the cocoa bean fermentation [6].