Crescent Moon Bath Bomb DIY
Serves: 7-8 bath bombs
These crescent moon bath bombs feature a gold moon and a sultry scent.
  • 7-8 Disk Mold & Package
  • 2 cups Sodium Bicarbonate (Baking Soda)
  • 1 cup Citric Acid
  • 2 oz. Coconut Oil
  • 0.2 oz. (about 9 mL) Polysorbate 80
  • 9 mL Bramble Berry’s Alien Type Fragrance Oil
  • 1 tsp. Queen’s Purple Mica
  • 1 tsp. Plum Dusk Mica
  • ½ tsp. Fine Iridescent Glitter
  • 1 tsp. Gold Sparkle Mica
  • Witch Hazel in Spray Bottle
  • 99% Isoproyl Alcohol
  • Dropper
  1. Melt the coconut oil in the microwave using 30-60 second bursts. Pour 2 ounces of coconut oil, 9 mL of the Bramble Berry's Alien Type Fragrance Oil, and 9 mL of polysorbate 80 into a small, fragrance oil-safe container. Use a spoon to fully mix the ingredients together.
  2. In a large bowl, mix together the baking soda and citric acid. To get rid of clumps in the mixture, you can push the powders through a sifter or break them up with your fingers. Citric acid has a tendency to take off nail polish, so wear gloves to protect your manicure. Thoroughly stir the ingredients together. Add the Plum Dusk Mica, Queen's Purple Mica, and Fine Iridescent Glitter to the powders and stir to incorporate.
  3. Add the oil mixture to the powder mixture. Use your hands to fully mix the ingredients together.
  4. Test the consistency of the bath bomb mixture. The perfect consistency for molding is a texture similar to damp sand that holds its shape when squeezed. If it’s too dry, use one hand to spritz the mixture with witch hazel and one to mix. Continue spritzing until the mixture holds its shape when squeezed. Below, you can see that the mixture forms a ball when squeezed. This means that the mixture will hold its shape in the mold as well.
  5. Fill the Disk Mold and Packages with the bath bomb mixture. Firmly compact the mixture into the mold to create a solid shape. Only fill each mold to the inner lip, or the lid will not close shut. Allow the bath bombs to dry and harden for at least 4 hours or up to overnight. If unmolded too quickly, they may fall apart.
  6. Once the bath bombs are completely dry and hard, remove them from the molds. Mix 1 tsp. Gold Sparkle Mica with 1 Tbsp. 99% isopropyl alcohol to create a "mica paint." Place the bottom of mold on top of the bath bomb to create a crescent moon shape and paint on the gold. If you find the mica paint is bleeding, add more mica to thicken. If it's too thick, add a bit more 99% isopropyl alcohol to thin.
  7. Continue this process with each bath bomb. Allow the paint to fully dry. The painted moons on top of the bath bombs will transfer mica when touched, so handle carefully. To use, place the bath bombs into a hot bath and enjoy! NOTE: Because these bath bombs contain quite a bit of dark mica, they may leave behind some color on your tub. Mica clings on to dirt and grime on the tub, so giving your bath a quick wipe down before use will help prevent this. The polysorbate 80 also helps the mica disperse throughout the water rather than pooling on top.
Recipe by Soap Queen at