New to shampoo bars? Then this is the one for you!
Add the coconut oil to a slow cooker set to low and wait for it to melt.
In a glass bowl, add the water then slowly stir in the lye.
Pour the lye mixture into the slow cooker, stir and blend using a hand blender. Cover and cook on low for 45 minutes.
Add the essential oil, stir and spoon the mixture into a mold and leave to cool.