donut bath bomb recipe

Red Velvet Donut Bath Bombs with Soap Icing Glaze

Unique and fun Red Velvet Donut Bath Bomb recipe for Christmas. Easy to follow directions with stunning results. Includes STEAM lesson idea for kids. 


  • 1 cup baking soda
  • 1/2 cup citric acid
  • 1/2 cup SLSA
  • 1/4 cup cornstarch
  • 1/4 cup coconut oil
  • 1 tbsp polysorbate 80
  • red velvet soap scent
  • red and off white food colouring
  • 1 tbsp cocoa powder
  • 2-3 cubes goat's milk soap
  • decorative sprinkles


  1. Add all dry ingredients, baking soda, citric acid, SLSA and cornstarch to a large bowl. Mix dry ingredients together.

  2. In a small bowl add coconut oil and heat in a microwave for a few seconds until it melts. Add polysorbate 80 and red velvet scent. Mix wet ingredients together, then add those to the dry ingredients.

  3. Add cocoa powder to bowl and mix all the ingredients together.

  4. Add 1 small drop of color to mixture and mix in well. Continue to add a small drop and mix until you achieve the red velvet colour you want. I went for a more chocolate with a hint of red but create whatever you like! Mix everything together well. 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.

  5. Add your mixture to your mold and pack in tightly. Use your hand or the bottom of your gel coloring works well! Allow to dry at least 24 hours or until completely dry to the touch.

  6. Carefully “pop” bombs from mold. Spread out onto a baking sheet or plate.

  7. In a small microwave safe bowl, melt your soap cubes in microwave for 15-20 seconds. If it is still not completely melted, heat for another 10 seconds. Mix between heatings.

  8. Using a squirt bottle or spoon, drizzle soap over donut bath bomb. Immediately after adding soap glaze, add sprinkles. Let set for at least one hour.