Our liquid castile soap uses only coconut oil & olive oil– a perfect blend for soft foam!
Total Time: 6 hours
Servings: one casserole dish of soap paste
Author: Mae Coffaro
Ingredients
- 28 oz. coconut oil
- 8 oz olive oil
- 19.44 oz water
- 8 oz glycerin
- 9.15 oz KOH
Instructions
- Weigh out all of the oils and melt them together on low heat.
- Mix the distilled water and glycerin in a separate bowl with some extra room for the next step.
- Add the Potassium hydroxide (KOH) to the water/glycerin mixture. I usually do this outside as the fumes are toxic, so don’t inhale them! It also gets VERY hot, so use oven mits when moving the bowl. Always pour the lye into the water and not the other way around. I use a full face gas mask and gloves when working with lye.
- Let the potassium hydroxide solution cool to a temperature around the same temperature as the oils– aim for around 100 degrees Fahrenheit for each.
- Add the potassium hydroxide solution to the oils and use an immersion blender to blend them together. It will turn cloudy and thicken, and then it will look curdled. Keep blending until it starts getting too thick to blend with the immersion blender. Once it starts thickening, it happens fast and turns into paste very quickly.
- Heat the paste in the oven or a slow cooker at the lowest temperature (around 170 degrees F or so), mixing every 25 minutes or so until the soap paste until it becomes translucent. Dissolve a small amount in some distilled water and see if it dissolves clear. If not, continue to process a little longer. You’ll probably end up cooking the paste for a few hours.
- Once processed, you can store the soap paste in glass jars. The soap paste will keep longer than diluted liquid soap.
- To make liquid soap, dissolve the paste in water. I use 4:1 parts of water:paste. Add essential oils for scent (check third-party tested essential oils for purity!).
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