What is the recipe for black soap?

The soap is brownish-black in colour with a soft texture and a natural earthy smell. The basic recipe is centuries old, having been handed down over the generation with slight variations in ingredients depending on what is locally available and each family formulating their own unique methods and ingredients. They have continued their success, by passing each formulation down from one generation to another, as they have for centuries. The soap is know as Anago or Alata Soap in Ghana, Ose Dudu in Nigeria or just Pure African Black Soap