How to make liquid soap

how to make castile liquid soap from barNatural liquid soap is incredibly versatile, to say the least. You can use it around the home to wash dishes, laundry, floors, windows and toilets; or you can use it as part of your skincare regime as body wash, shampoo, face wash, shaving cream and even bubble bath! This is a MUST-DO on anyone’s natural DIY list, especially because this one recipe can replace the multiple toxic cleaners in your home. You no longer have to fork out the cash for Handy Andy, Sunlight, Pantene, Jik, Domestos et cetera et cetera.

Liquid soap, or even castile liquid takes two minutes to make once you have a hard bar of natural soap. If you don’t have a bar of soap, then make your own natural or organic soap bar (here’s the recipe). If you are interested in making a true castile liquid, you will need to make or use an olive oil based soap. Again, you can follow my beginner soap bar recipe and just use olive oil as your ingredient.

Once you’ve made this liquid soap (see the method below), you can transform it for different uses with different essential oils, or you can embark on making these recipes:

Moisturising honey & coconut body wash
Anti-dandruff shampoo

TIP: You can change the thickness of the texture by adding less water. In other words, if you add about 50ml instead of 250ml of water, you will have a gel-like soap that may be better suited for shaving cream, bubble bath etc.


DIY Castile Liquid Soap
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  1. 1 Bar of natural/ castile soap
  2. 250ml Water
  3. 10-20 drops Essential oils (optional)
  4. Funnel (optional)
  1. One standard soap bar, makes about 250ml of liquid soap.
  2. Grate your bar of soap in a medium sized bowl.
  3. Boil 250ml water, and mix gently with the grated soap until all the soap dissolves. Avoid mixing too vigorously, as this will destroy the bubbles.
  4. Transfer the mixture to your container with a funnel.
  5. If using essential oils or other additives, wait for the mixture to completely cool before adding.
  1. Dishwashing liquid, multipurpose home cleaner, body wash, shampoo, shaving cream, bubble bath.
Essential oil suggestions
  1. For strong antibacterial action for home cleaning -> Tea tree, Thyme, Eucalyptus
  2. For shampoo -> Rosemary
  3. For body wash -> Lavender, Chamomile, Geranium, Rose
  1. To make a thicker, gel-like texture use less water (+/- 50ml water per bar of soap).
Natural Nerd


Approximate cost: R10,69 per 250ml (this is how much it costs to make one bar of a coconut-olive oil soap)
Lasted me about:
 3 weeks (using every day as body wash)
Estimated shelf life: 1 year (stored in an airtight container away from direct sunlight).

*Costs accurate at time of writing this blog post. Costs based on the best available prices I’ve personally found.


  • Time: Making liquid soap only takes two minutes, but if you have to start by making your own soap bars and waiting for them to cure, then the process takes about two months.


  • Versatile: I have saved so much money, since I no longer have to buy separate cleaning products anymore. This one soap works on everything I need it to!
  • Easy Customization: In order to transform this soap from Sunlight dishwashing liquid to a Radox-like body wash, you just need to use different essential oils, add a bit of honey and Vitamin E oil.

Not sure where to find ingredients? My shopping guide may help you.


If DIY just isn’t your thing, I recommend buying this product which I have personally used and approved: Pure Simple’s Castile liquid , or for more home cleaning power then use Triple Orange All Purpose Cleaner Wonder Gel.

How will you use this liquid soap? Let me know in the comments below.