• Weight all your ingredients.

Menthol Crystals

• Add menthol crystals into the fragrance oil.
  
• Keep mixing until the menthol crystals dissolve.
  
• Set fragrance mixture aside for now.

Dry Ingredients

• Put your baking soda, citric acid and kaolin clay into a large bowl and mix well.
  
• Add the fragrance oil and menthol crystal mixture to the dry ingredients.
  
• Mix well. Don't worry, the fragrance and menthol will not cause any fizzing.
  
• Add mica powder and mix again - Normally at this point, I will just use my hands to mix it.
  
• Spray the mixture with rubbing alcohol and then mix well.
  
• Check the consistency, you want to be able to drop a ball of the mixture back into the bowl without it breaking apart.

  If you have made bath bombs before, this is the same consistency you are going for.
  
• Once you have the desired consistency, start putting the mixture into your mold. Be sure to pack it in the mold tightly.
  
• Allow to dry for a few hours, then remove from the mold.
  
• Wait 24 hours and enjoy!