I did a quick search and found this. Looks like a lot of work with very specific ingredients.
Remove the cocoa beans from the pods and burn over low flame until they turn to ash. Burn the plantain skins to ash. Add water to the cocoa bean and plantain skin ashes. Place the coconut palm oil in a double boiler. Add the ashes and shea butter to mixture. Cook over low heat, stirring until mixture becomes smooth. If you want, add an essential oil like lavender or rose geranium while liquid is cooking to add a scent. Soap should start to solidify and float to the top of liquid. Use a spoon to scoop out the soap mixture as it settles on top of the liquid. Place the soap mixture in a mold. The soap will conform to the mold once it has completely cooled. Allow two weeks for soap to cure before using.
Read more: African Black Soap Recipes | eHow.com
http://www.ehow.com/way_5332113_african ... z1D6cFQJhFSo my French speaking abilities need a little work......