Homeade Laundry Soap recipe

I have been making my own laundry soap for years now.   I always get asked for the recipe so I decided to post it.  Here are the ingredients you need:

One of the things to note when getting your ingredients is that Arm & Hammer Super washing soda is different from Arm & Hammer laundry detergent.  Make sure you grab the correct box.

These ingredients minus the fels naptha bar soap can last me well over a year.  When I run out of  laundry detergent, I just have to buy a new fels naptha bar.  It costs $1. Not bad at all.

Homeade laundry detergent recipe:

1 cup Arm & Hammer Super washing soda

1 cup Borax

1 cup baking soda

1 fels naptha bar

I use an old laundry detergent bucket and keep filling it back up.  One of these days I will make something cute but for now this works.

Measure and add the first 3 ingredients

Grate the fels naptha bar

Mix it all together and tada, you are done.

Use 1 TBS for normal loads.  2 TBS for extra dirty loads.

I have not noticed a difference from this recipe and the pricey detergent I used to buy.  They both clean well.  Let me know if you make some.

Thanks for reading


  1. This sounds interesting! Two questions: Does the Fels Naptha melt in cold water and can you use this in the he machines? I already add Borax powder and/or the washing powder to my loads with the cheap liquid that I use. This wouldn’t be too difficult to mix up.
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  2. I have tried your home made laundry detergernt, and I LOVE it!!! Thank you so very much

  3. Sandie Maldonado says:

    I am making this homemade soap tomorrow. I will definitely let you know how it works. I am very excited about making this soap and hope it gets out the stains from my husband’s work clothes since he’s always dropping food on his t-shirts…lol

  4. is this soap good for the he machines?

  5. is this soap good for the he machines

  6. I made this detergent in January, tripled it, and just now made another batch, single one. I was by no means getting low, but love the way the kitchen smells after you grate the soap, and just needed something to do. I absolutely love this soap.

  7. tempest sharp says:

    i was wondering if you had problems with getting grey stains on your whites using this. i use a similiar recipe, minus the baking soda, and i have grey spots on my white shirts.

  8. I have also made this recipe w/o the baking soda and have had difficulty with it dissolving in cold water (I’ve also tried using a bar of plain Castile soap instead of fels naptha). Could our well water is too cold to allow the powdered ingredients to dissolve completely?


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