Cold Process Breast Milk Soap Recipe: A Guide To Making Your Own Soap

The Benefits of Breast Milk Soap

Breast milk has been used for centuries for its nourishing properties. It is rich in vitamins, minerals, and fatty acids that help to soothe and moisturize the skin. Breast milk soap is a natural alternative to commercial soaps that can contain harsh chemicals and irritants.

The Process of Making Cold Process Soap

Cold process soap making is a traditional method that involves mixing oils, lye, and water to create a chemical reaction that turns them into soap. It is important to use a lye calculator to ensure that the correct amount of lye is used for the recipe. The process can take a few hours, but the end result is a high-quality, long-lasting soap.


  • 8 oz breast milk
  • 8 oz coconut oil
  • 8 oz olive oil
  • 2 oz castor oil
  • 2 oz shea butter
  • 2 oz lye
  • 1 oz fragrance oil (optional)


  1. Wear gloves and safety goggles to protect yourself from the lye.
  2. Mix the lye and breast milk together in a heat-resistant container. Allow to cool to room temperature.
  3. Melt the coconut oil, olive oil, castor oil, and shea butter in a separate heat-resistant container.
  4. Combine the lye mixture and melted oils. Mix until trace is reached.
  5. Add fragrance oil if desired.
  6. Pour into a soap mold and cover with a towel.
  7. Allow to cure for 4-6 weeks.

Tips for Making Cold Process Soap

  • Always use a lye calculator to ensure the correct amount of lye is used for the recipe.
  • Wear protective gear when handling lye.
  • Use a digital scale to measure ingredients accurately.
  • Mix until trace is reached, which is when the soap mixture has thickened enough to leave a trace on the surface.
  • Use a thermometer to monitor the temperature of the lye and oils.
  • Allow the soap to cure for at least 4-6 weeks to ensure it is fully hardened and mild.

How to Use Breast Milk Soap

Breast milk soap can be used just like any other soap. Wet hands or body, lather soap, and rinse thoroughly. It is gentle enough to use on sensitive skin and can even be used on babies.


Making your own cold process breast milk soap is a fun and rewarding experience. It is a great way to utilize the nourishing benefits of breast milk and create a natural alternative to commercial soaps. With the right ingredients and precautions, anyone can make their own high-quality soap at home.