If you wish to make soap the truly old fashioned way, use nothing but tallow and potash. This recipe makes approximately 3 pounds of pure tallow old timey soap.
This soap is made using the cold process soap making method. Do not attempt to make this if you do not know how to make cold process soap and do not know the proper safety procedures for making this type of soap.
40 Ounces Tallow
5.20 Ounces Lye
12 Ounces Water