Place the dry ingredients in a large bowl and mix together with a whisk.
In a small bowl, mix the liquid ingredients together until well blended.
In the large bowl, very slowly add the liquid mixture to the dry ingredients at little bit at a time. Mixture should hold together when squeezed without crumbling.
When well mixed, pack the mixture into your bath bomb mold and pack tightly, then let it dry. Make sure you work quickly so the mixture doesn’t dry out in the process.
Bath Bombs need a day to several to fully harden. If they’re not quite hardened enough, they may crumble when you handle them, so check to make sure before taking them completely out of the mold