This study aimed to convert a rotary cocoa bean dryer into a roasting machine capable of performing both functions, thereby facilitating the production of a higher value-added product. Additionally, it sought to achieve savings in propane gas (LPG) consumption for the equipment. The study identified the essential components needed for this transformation and analyzed the equipment’s performance using simulation software. It inspected critical components of the dryer and designed the necessary roasting elements. Several prototypes were developed to enhance cocoa bean removal and increase operating temperatures. The final design was then constructed, and the prototype was tested to measure LPG consumption and temperature. Results demonstrated that the modifications improved burner temperatures, achieving a blue flame during combustion and nearly uniform temperatures across the plate. The proposed transmission components, including the main shaft and electric motor, did not require significant alterations to the equipment. Ultimately, this project established critical technological features necessary for adapting similar equipment. Regarding energy consumption, 30 kg of LPG was used to roast 10 quintals of cocoa, resulting in a 40% reduction in energy use compared to other roasters.