DIY: Homemade Castile Shampoo Bars with Tea Tree and Peppermint - Kim Becker {aka MommyKnows}
DIY: Homemade Castile Shampoo Bars with Tea Tree and Peppermint 8 oz Olive Oil 4 oz Coconut Oil 4 oz Castor Oil 2.19 oz lye 4 – 6 oz water Add Essential Oils for scent. In this case I added 1 tsp of Tea tree Oil and 1 tsp of Peppermint oil.