So many soap recipes you run across have a long list of different types of oils to use. And each oil requires a different amount of water and lye to saponify correctly. I recently ran across this nice and simple 3 ingredient soap recipe.
http://www.sustaincreateandflow.com/pure-coconut-oil-soap/
Thanks for the link. It appears to be very simple, using only three ingredients: coconut oil, lye, and water, provided coconut oil can be had during the hard times. She also slammed the use of lye as dangerous, but then used it in her formula. When growing up on the farm (back in the 50’s), we used lye and livestock fat. Worked great. Plus boiling off the fat resulted in these crispy crinkles that were to die for. Literally! :-)