When it comes to making your own cleaning products, beauty products and household helpers, one thing that is often called for is liquid castile soap like Dr. Bronner’s. Usually people are shocked by the price of it and get turned away from buying it and thus, give up on doing things themselves, While it is true that Dr. Bronner’s is often expensive, it is kind of relative. Since Dr. Bronner’s goes a long way and is concentrated, it really is, use-for-use, very low cost compared to what you would spend on store bought cleaners and beauty products.
However, if you are like me, you just know there is a cheaper way to do just about anything and castile soap is no different. Turning a bar version of castile sopa into a concentrated liquid is very easy and take little time or extra ingredients.
I found the cheapest way to do this is using Kirk’s Castile Soap. It is around $1.25 a bar and is often bought in packs of three. I found mine at Fred Meyer for just over $3 for all three bars so this had me all kinds of giddy.
You can also order Kirk’s Castile Soap online if you cannot find it in a store near you for a bit of an increase in price, but still much cheaper than Dr. Bronner’s. This soap concentrate can be used in any recipe that calls for liquid castile soap, but since it is so concentrated, use a little less. For instance, if you are making my soft scrub recipe, use only 2 tbsp as opposed to 3 1/2.
Kirk’s Castile only contains a couple ingredients so I love how natural it is and it smells great, too!
How to Turn Bar Castile Soap into a Concentrated Liquid
- 1 Bar Kirk's Castile Soap
- 3 Cups water
- 2 Tbsp Glycerin
- Start by boiling the water in a tea kettle.
- On a cutting board, cut up the bar into small chunks. You want them as small as possible. You could also grate it, but I find cutting to be much faster. It cuts really easy and is not hard.
- Place the soap in a glass bowl or container. When the water boils, measure out just under 3 cups and pour over the soap.
- Give it a good stir and let it sit, covered for about 20 minutes. Every once in a while, go give it another gentle stir to make sure the chucks all melt.
- At this point, add the glycerin. The glycerin will help it stay more liquified as opposed to a gel.
- When all chunks are melted, pour into a glass mason jar, label it and you have your liquid castile soap!
Post Notes based on reader’s comments-
Some people are saying they are getting something that is congealed or extremely think when it cools. I have been told this could be due to elevation or needing to add more glycerine. I did not have this issue personally, just a bit of separating, which was remedied by just shaking it. However, I also used up what I made fairly quickly and I live at a lower elevation. Here are some reader’s suggestions should you encounter this:
If I can add my 2¢ on this please…? I have made bar soap before, both hot process and cold process, but never Castile in any form. I wanted to make this bc I was looking for good *cheap pumpable liquid Castile* and had a bar of Dr B. castile soap (5oz) and thought what the heck?! 🙂
I grated the entire 5oz bar of soap on a box grater.
I added 4 1/3 Cups of boiling water into a BIG Pyrex measuring vessel along with 4TBS of glycerin.
( I also squeezed in a bit of aloe from a broken plant that I wanted to use up..1oz maybe? Nothing significant) It all melted splendidly! Poured into a 1/2 gal mason jar and went to bed. This morning it was VERY thick (def NOT pumpable) So I added a little boiling water at a time and using an immersion stick blender at each addition, (any agitation will do) and allowed to cool until I got to what I was looking for: not jelled, but a pumpable, concentrated veggie based soap (almost 6 Cups!!) that’s easy on skin! Now my sons can use this, get squeaky clean, and I don’t have to watch the Castile bar soap dissolve in a matter of days. Hooray! #winning
Also, for those that have that white film when washing glasses… A quick dunk in 10% white vinegar rinse does the trick .. Or add white vinegar to the “rinse aid” compartment of your dishwasher.”
“I tried this too, and when it gets kind of gelled, I use a hand mixer to break it up, seems to help a lot. Hope this is helpful for you! I find I need the more concentrated version because my husband doesn’t believe that suds don’t equal clean, so he refuses to use the homemade stuff either. I find myself having to do more of the cleaning now because he will not use homemade products, even with the baby girls we have (okay the 4 year old isn’t a baby anymore, but she is my baby). Just wish I could afford to stay at home!”
Thank you for being such a great community and helping to come up with a solution!