How Do I Make Soap With Glycerin and Cornstarch?

Written by jennifer uhl
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How Do I Make Soap With Glycerin and Cornstarch?
Make soap from scratch using glycerine and cornstarch. (Aaron Graubart/Photodisc/Getty Images)

Glycerine is a base that melts easily for soap making. Cornstarch is a common ingredient in vegan soap that soothes the skin, where normally milk might be used.

Skill level:

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Things you need

  • Cornstarch
  • Knife
  • Glycerine soap
  • Wooden spoon
  • Mixing bowl
  • Soap moulds

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  1. 1

    Lay your block of glycerine soap base on a sturdy flat surface such as a cutting board. Cut the block into small cubes or grate it with a cheese grater to create smaller pieces. This allows for more even melting.

  2. 2

    Pour your soap pieces into a microwave-safe mixing bowl. A glass bowl is typically ideal, but will become hot during the melting process, so use caution.

  3. 3

    Add your cornstarch. Adding 1/4 of a cup of cornstarch to 0.454kg. of melt-and-pour glycerine soap is generally ideal. Mix the two ingredients together thoroughly, so that the cornstarch is distributed evenly. Add in any other emollients that you want to use in your soap during this step, including dyes, fragrances and herbs or other natural ingredients such as oatmeal.

  4. 4

    Melt your soap mixture in a microwave according to the manufacturer directions. Watch your soap mix carefully while melting. Do not leave it unattended at any time during this process.

  5. 5

    Give your soap mix one last stir with a wooden spoon, and then pour it into individual soap moulds. Allow the soap to cure over a period of at least 24 hours before removing from the moulds.

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