How To Make Pure Coconut Oil Soap
Ingredients
All amounts are per weight. You will need to use a scale for these measurements.
Lathering Skin Bar (20% superfat)
Note: Because this soap is highly superfatted it can create a very dense lather when rubbed directly on skin. For a light, bubbly effect I recommend lathering with a natural sponge.
- 33 oz coconut oil, 76 degree* (where to buy coconut oil)
- 4.83 ounces lye (NaOH)** (where to buy lye)
- 12.54 oz water
- .5 – 1 ounce essential oils (optional)
Laundry Soap (1% superfat)
All amounts are by weight
- 33 oz coconut oil, 76 degree* (where to buy coconut oil)
- 5.9 ounces lye (NaOH)** (where to buy lye)
- 12 oz water
- .5 – 1 ounce essential oils (optional) (where to buy essential oils)
* For soap making purposes there are several types of coconut oil. The stuff I buy has a melting point of 76 degrees. This is the most commonly available kind and the preferred type for soap making. There is also a coconut oil that has a melting point of 92 degrees and another that is “fractionated,” meaning that the long chain triglycerides have been removed, leaving only saturated fats. I have not tested this recipe with either the 92 degree or fractionated oils, but it works well with the 76 degree type.
** You can often find 100% lye in the drain cleaner section of a mom n’ pop hardware store. Lye is a naturally occurring substance that can be made by burning hardwoods and boiling the ashes, but it’s much easier to just buy. If you don’t see it, ask a sales clerk for help. They may be keeping it behind the counter because it has multiple uses. Be prepared to explain that you want to make soap, not meth. 
Equipment:
Note: All equipment should be reserved for soap making only.
- crock pot - 8 quart
- stick blender
- digital scale
- thermometer
- glass measuring cups
- small glass bowls
- plastic spoon with long handle
- rubber spatula
- sink or bowl filled with vinegar and water for cleaning anything that comes in contact with lye. Follow by cleaning with soap.
- protective equipment: long-sleeved shirt, plastic/rubber gloves, safety glasses or protective eye gear
- soap mold – (where to buy oval soap mold or square soap mold) A standard sized bread pan is perfect for this batch, cardboard boxes will also work
- parchment paper for lining the soap mold (where to buy parchment paper online)
Photo Tutorial:
Step 1: Weigh your ingredients and set your crockpot to low
Step 2: Add water to a medium-sized glass or ceramic bowl and take it outside along with the lye and long-handled spoon. While wearing your protective gear and taking care not to breathe the vapors, slowly add the lye to the water while mixing gently. Order is important here, so make sure it is the lye you’re pouring into the water.
The mixture will get very hot so be careful! Let it transition from cloudy to clear, then bring it inside. Let cool for 5-10 minutes while you work on step 3.
Step 3: Place coconut oil in a saucepan and heat to 120-130F. Make sure that your thermometer is not touching the bottom of the pot when taking your reading.
Step 4: Place coconut oil in your crockpot
Step 5: Add lye to crockpot (being careful not to splash) and stir a few times.
Step 6: Using the stick blender begin mixing toward “trace.” You’ll know trace is achieved when the mixture has the texture and thickness of a light pudding.
Step 7: Cover and let cook on low. During this process the oils should rise up the sides like a wave and then fold back into the mixture. Mine usually takes 45 minutes – 1 hour but the cooking time will vary depending on how hot your crock pot is. Check on it often.
Step 8: When the soap is ready it should look a little like semi-translucent vaseline with no oil puddles in the middle. There are two ways to test and see if it’s done. First, dip a PH test strip and wait several minutes for it to fully change color. It should be between 7-10. If it is higher than 10 it’s not done. For a slightly less scientific approach, take a little of the soap and rub it between your fingers. It should feel a bit waxy. Now touch it to your tongue. If it ‘zaps’ you, it’s not done. Note: It is really important to make sure all the lye is converted – otherwise the finished soap can burn!
Step 9: If you’re adding essential oils, wait until the mixture cools a little and then add them, otherwise they will lose their fragrance. (I skipped this, so no photo!)
Step 10: Spoon mixture into your mold and let cool. If you want to speed up this process put it in the fridge
Step 11: Unlike other bars which need to harden for 24 hours before being cut, coconut oil makes a very hard bar that will be difficult to cut if you let it dry too long. Cut as soon as it’s cool and firm.
Step 12: In an area with good air flow, place bars on a rack/tray with about an inch of space between them. Allow them to dry out and harden for another few days. Though you can try your first bar right away, it’s best to let them sit for 2-3 weeks to let the conditioning properties fully develop.
Shelf Life
About 1 year when stored in a cool, dry place.
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