Step 1

In a large bowl, combine corn starch, citric acid, epsom salt, baking soda, mica powder (optional), and dried orange peel. Whisk to incorporate completely.

Step 2

In a small bowl or measuring cup, whisk together coconut oil, essential oil, and water.

Step 3

Very slowly add the oil mixture to the dry ingredients. Pouring slowly helps make sure the mixture fizzes as little as possible. Mix together until it resembles wet sand and everything in fully incorporated.

Step 4

Transfer the bath bomb mixture into bath bomb molds, making sure to press the mixture tightly into each mold half. Overfill a little to ensure that the two pieces stick together when pressed together. Press the mold pieces together and twist until closed.

Step 5

Allow the bath bombs to dry for at least 24 hours.

Step 6

To remove the bath bombs from the molds, tap the outside of the mold gently and twist each side of the mold and pull apart to remove the bath bomb.

Step 7

Store bath bombs in an airtight container or wrap in plastic wrap.

Step 8

To use the bath bomb, simply drop it in water and watch it fizz and dissolve.