CFcurls, are you interested in savon noir for its properties or is your main interest in making soap? If you mainly want the soap itself it is much easier to buy it.

Traditionally savon beldi is made from olive oil and ash from burnt wood. Some people would use black olive paste... Our grandmothers used to cook this at home but in my expérience it is à bit tiresome: it takes a lot of time and needs to be mixed a lot. I think you could find some YouTube videos about making savon beldi, but they might be mostly in French or Arabic... (?)
With all due respect I don't agree with the previous poster. Soap is not only a wash-off product. It does have an effect on your skin. Savon beldi/savon noir is very rich in vitamins and actually cares for your skin. The same as its "cousin" the black soap used mainly in West Africa. They are both also very suitable for people with very dry skin or skin conditions.
Savon beldi is used with a glove, "kessa". It is not only the glove that exfoliates but the soap also. It kind of prepares the skin. You leave the soap on the skin for some minutes before rubbing with the glove. You can't get the same results with other soaps. After you spread some argan oil on damp skin and voilà, you have baby soft skin that glows.

This is the secret to great skin.
And savon noir is not expensive. I don't know about the fancy western brands, but the traditional moroccan version is very affordable and a small jar lasts for a long time.
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