Here, we examined the use of cocoa pod ash as a catalyst to produce biodiesel from oil obtained from castor seed oil. We then compared the effect of the catalyst before and after use to determine whether it has an impact on biodiesel yield. We considered if the catalyst cocoa pod ash has any effect on the yield of the biodiesel produced. Hence this study provides significant contribution for other research in the field. To the best of our knowledge, this is the first reported study on the use of cocoa pod ash as a catalyst to produce biodiesel.