Using a mixer with the whisk attachment, add all ingredients and increase speed to high. Mix until the food coloring is fully incorporated, about 2-3 minutes. The final mixture should feel like wet sand. 

If you have bath bomb molds, you can tightly pack the mixture into your molds. If you don’t have molds- don’t worry! We used a standard muffin tin with silicone muffin liners. You can also use traditional paper liners. This just ensures that the bath bombs come out easily when they’re dry! 

Allow the bath bombs to fully dry (about 24 hours). Store in an airtight container until you’re ready to use.