Castile soap is a staple in any toxin free home and in DIY beauty and DIY cleaning recipes. It can be so expensive though! This simple two step method will show you how to make homemade liquid castile soap from a br for much cheaper!

I truly adore castile soap. I use it almost everyday of my life in some way, shape or form. Almost every one of the things we make homemade to save money use it (Six Dollar Family). After all, it is one of the most versatile soaps out available.
But, as much as I love using it, liquid castile soap can be incredibly expensive. At more than $15.00 for a 32 oz bottle, you could easily go broke if you had to constantly buy it. Luckily, liquid Castile soap is super easy to make at home and all you need is five minutes and two simple steps.
How to Use Homemade Liquid Castile soap
This homemade liquid castile soap can be used on it’s own or in any DIY beauty recipe or DIY cleaners that you might make. You use it just as you would any store bought bottle.
How Hard is Liquid Castile Soap to Make?
Learning how to make homemade soap can be an experience all in it’s own, but short of using melt and pour soap base like my homemade lavender soap recipe (Six Dollar Family) to create your own bars, making homemade liquid castile soap from a bar is by far the easiest soap you can make.
Because you start with a soap base that is already made and cured, the steps to making it are significantly reduced making it far easier. In fact, once you make this one, you may want to move onto a few harder homemade soap recipes (Six Dollar Family).
How Do I Add Scent to My Homemade Soap?
Add scent to your soap is almost easy as making it! Since you’re making a non-toxic soap, you’ll want to stay away from anything that could potentially have toxins in them such as regular soap fragrances (Amazon).
Instead, you’ll want to use a 100% pure essential oil. A few good additions might be peppermint, rose geranium, lavender and even sweet orange oils.

How to Store Homemade Castile Soap
Once your castile soap is cooled, store it in an empty soap bottle or a glass mason jar. If you used essential oils to add a scent to your soap, be sure to use a glass soap bottle (Amazon). Essential oils can degrade plastic causing toxins to leech into your soap.
How to Thicken Homemade Liquid Soap
If after making your homemade liquid castile soap, you find that your soap is too thin, you can thicken it by making a salt water solution. Add .5 oz regular table salt to 1.5 oz warm distilled water and stir until it is dissolved. Then, in very small amounts (1 ml or less), add to your soap and stir. Continue adding the salt water solution to your soap until you’ve got the consistency that you want.

You will need:
- 1 bar Castile Soap
- 6-12 cups hot water
- Cheese grater
- Heavy Bottom Pot or 5-gallon bucket
- Wooden spoon
- Essential oils if you wish to add a scent
How to Make Liquid Castile Soap from a Bar of Soap
Equipment
- Heavy Bottom Pot or 5 gallon bucket
- Soap Grater
Ingredients
- 1 bar Castile Soap shredded finely
- 8 cups water boiling
- Essential Oils Optional
Instructions
- Shred the bar of castile soap using the fine side edge of the grater. Heat the water to boiling.
- Add the shredded soap flakes to the pot or bucket then carefully pour the water over the soap flakes being careful not to splash. Use the wooden spoon to stir the soap flakes into the boiling water until it's melted.
- If you're using essential oils, wait for the mixture to slightly cool and add 30-40 drops to your soap. Stir well and allow to cool fully before moving to your storage container.