n a glass bowl, mix together all of your dry ingredients (baking soda, cornstarch, citric acid and epsom salt) and set aside.
In a separate bowl, combine your oils. While stirring, SLOWLY add these to the bowl of dry ingredients. If you pour too fast, the liquid will cause a reaction with the citric acid.
Using your hands, knead everything together until your ingredients start to hold together. Think wet sand.
Fill each half of your bath bomb mold with the mixture until it’s overflowing a little bit. Press together, and let sit on a cookie sheet, for 10 minutes. Gently remove one side of the mold, let dry a little more, about 10 minutes. Remove the other side, VERY GENTLY. These can fall apart very easily if you aren't careful.
Let your bath bombs dry for at least 24 hours, and they’ll be ready to go!
Wrap them up and give them to your girlfriends as gifts (they'll love you forever!) or keep them all for yourself. I don't judge.