Mix all the dry ingredients together in a medium size bowl. Stir until well incorporated.
Add in the coconut oil, essential oils, and vanilla. Whisk together until well combined.
With a spray bottle spray the mixture with water until the ingredients hold together when squeezed in your hands. Only do one spray at a time to make sure you don't get it to wet.
Prepare your bath bomb molds by greasing them with coconut oil.
Press the mixture into both sides of the bath bomb molds and then press the two sides together. Rub the access mixture off the sides and set aside.
Allow the molds to sit for 24-48 hours or until completely dry and then pop out of the molds.