You can order pure soap flakes online (this brand is free from palm oil), or look at your local health food store. (treehugger.com)
Note, any bar soap that is rather pure soap, can be shaven and used in place of Soap Flakes. (wellness-media.com)
Mix soap flakes and water in a medium bowl or glass jug and stir until the soap is dissolved and let cool Stir in glycerin and essential oil As it cools it will form a loose gel Stir then pour into a bottle or squeezie container (superchargedfood.com)