Lump of Coal Bath Bomb Recipe for Christmas

Lump of Coal Bath Bomb Recipe

Have fun learning chemistry this Christmas by making Lump of Coal Bath Bombs for the stockings. 


  • 1 cup baking soda
  • 1/2 cup citric acid
  • 1/4 cup cream of tartar
  • 1/2 cup SLSA
  • 1/4 cup cornstarch
  • 1/4 cup coconut oil
  • 1 tbsp polysorbate 80
  • 10-20 drops cardamom essential oil
  • 10-20 drops clove essential oil
  • 1 tbsp activated charcoal add more as needed to get the right colour


  1. Add dry ingredients to a large bowl and mix.

  2. In a small microwave safe bowl, melt coconut oil in microwave for 25-30 seconds. Add polysorbate 80 and essential oils. Mix well, then add to dry mixture.

  3. Add in activated charcoal powder. Start with one tablespoon and add more as needed to get the right dark grey colour. Add glitter then mix everything together really well. Slip on disposable gloves and use your hands to really work everything together. You will know when the mixture is perfect when it feels like wet sand and you can press the mixture together in your hands and it stays together.

  4. Add the bath bomb mixture into mold and pack firmly. 

  5. Allow to dry at least 24 hours or until completely dry.