Jump to content

Liquid Soap - thoughts on this recipe

Recommended Posts

I  have made cp and hp  but have never have attempted liquid soap.

Any thought on this recipe? A couple recipes I have seen include neutralizing with borax.

This one doesn’t and seems easy enough to do for making Castile.



  • 24 oz weight (680 grams) olive oil
  • 16 oz weight (454 grams) coconut oil
  • 9.35 oz weight (265 grams) Potassium hydroxide lye flakes
  • 32 oz (4 cups | 907 grams) distilled water, for lye-solution
  • 10 to 12 cups distilled water, to dilute, plus extra as needed


Make The Soap Paste

  1. Add the olive oil and coconut oil to a large, (6 quart minimum) crock pot. Turn the crock-pot on high.
  2. While the oils are warming, put on your safety gloves and goggles, and carefully measure the potassium hydroxide lye into a stainless steel or pyrex bowl.
  3. Measure the water into a medium stainless bowl or pyrex pitcher. Set the container with the water into your sink, then very carefully tip the lye flakes into the water. Stir to dissolve.
  4. When the oils in the crockpot are warm, carefully tip the lye solution into the oils. Leave the crockpot on high.
  5. Use an immersion blender to blend the oils and lye solution together. Immediately after adding the lye solution to the oils, blend for about 5 minutes, until the mixture looks uniformly opaque and begins to slightly thicken. For the next 30 minutes, come back and blend the soap paste about every 5 minutes. The mixture will get thicker and thicker, progressing through an icing texture to something like Elmer's glue.

Cook Soap Paste

  1. When the soap mixture becomes too thick to blend with an immersion blender, lid the crock pot and cook the soap mixture for 3 hours on high.
  2. Every 30 minutes or so, come back and fold and stir the soap paste with a heat-resistant silicone spatula or heavy wood spoon to ensure the soap paste cooks evenly.
  3. As the soap cooks, it will become increasingly translucent, moving from a runny white liquid to a puffy taffy texture to, eventually, a yellowy-clear, thick, translucent gel.

Test Soap Clarity

  1. After 3 hours, or once the paste looks fully translucent and gelled throughout, check the soap with a clarity test.
  2. Measure out an ounce of soap paste (about a golf-ball sized blob will do it). Add 4 oz (1/2 cup) of boiling or very hot water to the soap paste. Stir gently until the soap paste is totally dissolved.
  3. Allow the dilute soap to cool. If the soap is opaque, or if a scum of oils floats to the surface, continue cooking your soap paste for another hour before re-testing.
  4. If the dilute soap is clear (it needn't be colorless, just translucent), proceed with dilution.

Dilute the Soap Paste

  1. Add 10 cups water to the soap paste in the crockpot. Break up the soap paste into the water as best you can but don't worry about the paste dissolving fully.
  2. Lid the crock pot and turn the heat to warm for 8 hours or overnight. If you happen to walk by, give the soap a stir to help it along but don't worry if you can't.
  3. After 8 hours, if you notice chunks of remaining soap or thick skin of soap forming even after the chunks of soap dissolve, add another cup or two of water to further dilute the paste.

Bottle Soap

  1. When your soap is fully dissolved with no chunks of soap paste remaining, ladle your dilute soap into a perfectly clean and dry 1-gallon glass or plastic jug.
Recipe by Northwest Edible Life at https://nwedible.com/how-to-make-diy-liquid-castile-soap/


Share this post

Link to post
Share on other sites

One of the best exercises i went through was making single oil liquid soap. You can mix to whatever proportions you want when diluting.

You can dilute tiny batches at a time from the finished paste. I find that the paste will last for years if stored cool and airtight.

I have never needed to use borax.


Also keep liquid coconut soap around for cleaning as it’s one of the most convenient and economical things to have around.

  • Like 1

Share this post

Link to post
Share on other sites

I am not sure how to input into soap calc. Would like to know thought on recipeposte and go with that, as I most likely will not make this into a big thing.

Share this post

Link to post
Share on other sites

Will look at soap calc again. I think they did 3 per cent super fat.

ok interesting, so I put seems easy enough and no water discount with liquid?

I want to do this because family loves Dr. Bronners but I hate the pricewith synth or essential oils, 


Will have to look up but does fragrance cause an issue with cloudiness. I know with some surfactants shampoo one you do have to use emulsifier for fragrance before putting into solution otherwise if wanting clear shampoo or hand wash it won’t be clear.


Share this post

Link to post
Share on other sites

Liquid soap uses a number of different calculations and in the end you just Gotta keep tweaking until you get what you want.

Some say potassium hydroxide is only 90% pure and use that 10% radio button on Soap calc. 

. Others assume it is 100% pure and then they have a 10% super fat.


Cloudiness and gelling and thickening all depend on what you scent with. For instance lavender essential oil will gel it into a solid pretty quickly no matter how hard you dilute.

Citruses will make it watery thin often even if you use a straight paste. There are no rules with liquid soap other than time time time and test test test.

Share this post

Link to post
Share on other sites

Yes,Saw the difference in mph and would get for whatever recipe calls for.

Saw list of problem essential oils. Very much like making shampoo!

Do you preserve?


Share this post

Link to post
Share on other sites

I don’t preserve - what I make is for personal use, and I do not sell it. It was too troublesome to make it consistent enough to trust for retail. Undiluted paste seems to last for years.

quite a few people use a mix of NaOH and KOH to thicken without as many headaches. They seem to get super clear soap at the end. One day... one day... 

Share this post

Link to post
Share on other sites

No interest in selling, you can buy by the gallon ready for use for resale but want to make for personal use. Bulk apothecary sells a gallon for $3.95!

Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...