A super simple and quick bath bomb recipe that doesn't use cornstarch.
Combine baking soda and citric acid and mix well.
Add coconut oil and essential oils. Use your hands to work the coconut oil into the dry ingredients, until the mix starts to stick together and is the consistency of wet sand.
Fill each half of bath bomb mold, slightly over-filling. Firmly press halves together and let mold sit for at least 15 minutes, preferably a few hours.
Use a spoon to gently tap the sides of the bath bomb. Slowly remove bath bomb molds and let your bath bombs dry for 24 hours before using.
Store bath bombs in a glass container, away from liquid, for up to 6 months.