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Homemade Glycerin Soap

Beautiful soaps are easy to make with a melt-and-pour technique—just add food coloring and mold using recycled milk cartons.

Source: Martha Stewart Living, January 2006


Glycerin is usually sold in large blocks at crafts stores; to melt it, cut it into small cubes that will fit in a microwavable bowl or measuring cup. You can also make multiple mini soaps by using ice-cube trays as your molds.


For more ideas, scroll through our entire collection of bath bombs and soap-making.


  • Clear glycerin soap

  • Food coloring

  • Coffee stirrers

  • Clean milk or juice carton

  • Petroleum jelly

  • Bench scraper


  1. Heat glycerin in a microwave on high, stirring at 15-second intervals, until it's completely melted.

  2. Mix liquid food coloring into bowl with a coffee stirrer. (Note: Food coloring is very strong, so use it sparingly.)

  3. Coat the inside of the milk carton with petroleum jelly. Pour in melted glycerin; let cool completely (about 2 hours).

  4. Tear away carton, and, using a bench scraper, slice block into individual bars.

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