The Colonel’s secret recipe - the source of KFC’s success – is 65-years old this month, and as closely guarded as ever. The blend of 11 herbs and spices is a secret even to KFC President Gregg Dedrick. "Presidents come and go, but the secret recipe remains," he said. The original handwritten recipe is kept in a safe at KFC headquarters, with portions locked away in safe deposit boxes at undisclosed locations as backup. Despite its age, the company has no intention of retiring the recipe.