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Hand milled soap Rebatch soap

Hand Milled Soap or Rebatch Soap

See how easy it is to make custom hand milled soap or rebatch soap. Plus a few tips and tricks you need to make it perfect every time.
Prep Time 15 minutes
Cook Time 4 hours
1 day 2 minutes
Total Time 4 hours 15 minutes
Servings 8 bars


  • 5 bars of soap natural or castille soap is best
  • 1 cup water

Optional for a moisturizing soap

  • 2 oz. Shea Butter for a rich moisturizing soap
  • 2 table spoons Coconut Oil
  • 2 table spoons Olive Oil
  • Essential Oils for fragrance

Supplies Soap mold Soap knife Whisk Slow Cooker

  • 1 Soap mold
  • 1 Soap knife
  • 1 Whisk
  • 1 Slow Cooker


  1. For this soap I used a combination of Dr. Bronners castille bar soap and a few bars of Ivory soap. This is what I had on hand. You can grate or chop the soap in small pieces.
  2. Then add the water, soap, shea butter, coconut oil and olive oil to a slow cooker. Turn the slow cooker on high and let cook down into a liquid. Keep in mind the more oils and butters you add the less lather your soap will have. I wanted a moisturizing soap for winter, so I added all the optional oils and butters. Also the more water you add the longer time it takes for your soap to dry out. But more water makes it easier to pour into the mold.
  3. Let all the ingredients hang out in the slow cooker on high for about four hours. After about two hours stir with a whisk. Then stir vigorously every 30 minutes to make sure all the soap is melted and does not burn.
  4. After four hours all the soap should be melted. Right before you pour the soap into the mold add 1-2 teaspoon of essential oil and whisk into the soap. I like to use a lavender and bergamont oil to make a relaxing soap. I decided on a silicone mold for my soap. Pour or scoop half the soap into the mold. Tap it on the counter to get out any air bubbles that may have happened when scooping out the soap. Add the rest of the soap and tap once again to get out any air bubbles.
  5. Let set for 24 hours or more before you unmold your soap. After 24 hours, carefully unmold your soap. Now is the time to cut it into bars, since it is still really soft. Using a soap knife to cut the soap into bars about an inch wide. It feels just like butter when you are cutting through it.
  6. Now let it cure for at least a week or two before you use it or gift it.