homemade body wash?

I'd like to try my hand at making homemade body wash.

Preferably, just a bare bones recipe that I can use as a base to spring board into experimenting with other additives (moisturizers, essential oils, etc)

the few recipes I've come across online have all kinds of different methods and extra additives, and I cannot seem to narrow them down to their basic essential recipes: some call for aloe, some call for liquid vitamins, some use milk, some use honey...and some just melt down a bar of soap and add glycerine to keep it in liquid form, which I think is silly and contradictory to the idea - I'd like to to this from absolute scratch.

Also, if anyone could maybe describe a few basic additives and what they're good for?