My family goes through a lot of soap. We particularly go through a lot of castile soap, which makes sense because we use it in practically everything! We use castile soap for our body wash, hand soap, dish soap, shaving, scrubbing, and probably a lot more!
I would pay about $30 for 64 oz of Dr. Bronners or I could pay about $14 for 64 oz of Dr. Woods. Now looking at those numbers, I guess you could say that it doesn’t seem very expensive but that price can add up when you go through soap as often as we do! Besides, why pay that much when you could pay just $4 for 64 oz or even less if you went with a cheaper brand?
Seems like a nice price to pay, doesn’t it? You could save $26 on just 64 oz of soap (if you are making Dr. Bronner’s soap that is. Price would vary depending on what you buy and what you’d compare it to) I can think of plenty of other items I can buy with $26!
How do you get so much soap for so little? Easy! All you need is 1 bar of soap! It doesn’t even have to be castile soap. I just mentioned castile soap because it’s what we have but you can definitely use any of your favorite bar soaps and turn them into liquid soap.
Bar Soap to Liquid Soap
1 - 4 oz bar of soap
1 Tbs. vegetable glycerin (optional -see notes below)
Pour 8 cups of water into a pot and heat until just before boiling. While the water is heating up, grate one bar of soap either by hand or in a food processor.
Once your water is just about to boil, add in the grated soap and stir. Mix until all the soap as dissolved, it will look like soapy water, don't worry it will turn into proper liquid soap. At this point, add in the glycerin if using. Allow mixture to cool for about 12-24 hours.
Once cool it will have thickened. Beat mixture with a electric mixer to fully incorporate. If the mixture seems too thick, you can add more water to thin it out. Pour into containers and you are all set!
Soap Note: Bar soaps vary in size. Dr. Bronner’s soap for instance is 5 oz and because of this I needed to add more water. If you were to do the math, it’s about 2 cups of water per 1 oz of soap. You should be able to use that math, to adjust your recipe if your bar soap is not 4 oz.
Glycerin Note: I have yet to add glycerin to my soap because so far I do not feel like it's needed it. By adding glycerin to your soap you can make your soap more moisturizing, so if you feel like your soap needs to be a bit more moisturizing then go ahead and add the glycerine!
Frugal Note: If you want to save even more money, double your batch! 2 bars of soap will make 1 gallon (or 16 cups) of soap. Just like you would save money on buying in bulk, so you can save by making in bulk!