In a large bowl, combine baking soda, Epsom salt, cornstarch, and citric acid.

If using multiple colors, divide mixture into separate containers, then add pigment.

Add essential oil(s) to each mixture.

In a small bowl, combine melted coconut oil and water. Divide coconut oil equally among mixtures, then SLOWLY mix the ingredients together. The consistency should be similar to wet sand.

Pack both halves of your bath bombs, over-filling each slightly. Firmly press together to seal. Set aside for 15 minutes.

Use a spoon to gently tap the sides of the bath bomb mold, then gently remove your bath bomb.

Allow bath bomb to sit for 24 hours before transferring to a glass container for storage. Bath Bombs will last up to 6 months.