Add baking soda, citric acid, and Epsom salt to a large mixing bowl and combine.
Melt the cocoa butter in the microwave.
Pour coconut oil into the melted cocoa butter.
Pour the butter and oil mixture into the dry ingredients and mix until they are all combined.
Add essential oils. Mix.
Spray the mixture with water and mix as you spray. Stop every five sprays to check the texture. Don't over water or you will activate the ingredients!
Grab a hand full of the mixture and squeeze. If it clumps together then, grab your molds and begin.
Add a few lavender pedals to one of the molds and scoop the mixture into both molds.
Press both molds together to form a ball.
Leave to dry overnight.
Fill the bathtub with warm water and throw one or two in. Enjoy!