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DIY liquid laundry soap for only 25 cents

Liquid laundry soap recipe.

Liquid Laundry Soap

A few months ago I posted my recipe for homemade oatmeal laundry soap and someone asked me for a liquid recipe, as some prefer a liquid detergent. So, liquid laundry soap reader – this post is for your homemade liquid laundry soap!


  • 1 Cup Natural Oatmeal Soap (or any other bar soap), Finely Grated
  • 1/2 cup Borax
  • 3/4 cup Washing Soda (recipe here)
  • 1/2 Cup Baking Soda

To turn this into liquid laundry detergent, simply:

Boil 12 cups of water.

Making Laundry Soap

Remove water from heat and stir in 1/2 cup of the above recipe. Stir until the soap flakes have melted.

Soap on the Stove

Allow to sit for 6 hours, or until cool, stirring occasionally. The mixture will look like a liquidy gel.

Stirring Soap

DIY Soap

Laundry Soap Recipe

Pour into an old laundry detergent bottle. This recipe makes just under 3 liters of laundry detergent.

Shake well before pouring 1/2 – 1 cup into your washing machine with your laundry.

I find the detergent very effective in the liquid form. Any extra stain fighters (Shout, OxiClean, Resolve) could be added for stubborn stains. In my home, for stubborn stains, I pop the clothing in a pail with water and a bit of vinegar and leave it in the sunshine.

The overall cost

The original powdered laundry soap cost $2.30. Since we are using only 1/2 cup of this mixture, our cost is lowered considerably.

3 litres of this laundry soap will cost less than $0.76, which makes it only $0.25 per litre!

For that price, it is certainly worth a try – don’t you think?

Have you ever made liquid laundry detergent?


  1. Lisa Anne

    Love this and I will be trying it. One question though…can it be used in high efficiency machines?

    • Sarah

      Absolutely! It is very low suds – which is what is required by HE washers 🙂 Glad you are going to give it a try! I don’t think you will be disappointed.

  2. Cynthia

    I want to try it too but what is “washing soda” ?

    • Sarah

      Hi there,

      Washing soda can be bought at most grocery stores (by the borax) but it can also be made by cooking Baking Soda at 400 degrees for 30 minutes stirring occasionally. It will turn sort of grainy. That’s it!

  3. Brittany

    Have you used this a long time? Do you know if it will fade dark colors? Hubby is skeptical for the sake of his work uniforms…..

  4. Jessica

    I’m so excited to make this! But I am curious, my hubby and I LOVE the smell of Gain. Febreze make a scent booster that has the original Gain smell. Can I add this to the detergent? Or will that cause problems?

    • Michele

      I have made the dry detergent and added in the dry Gain. I plan on making this with the Apple Mango Tango, my favorite.

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