Homemade Laundry Soap

We have been making our own laundry soap for a while now and since people keep asking for the recipe I figured I should post it online. It’s incredibly simple to make and is several times less expensive than any commercial soaps out there. You can find all the needed ingredients at any grocery store or even on Amazon (although the local store will be cheaper).


  • 1 cup borax (usually sold as 20 Mule Team Borax)
  • 1 cup washing soda (not the same as baking soda)
  • 1 bar/4oz of Ivory or Castile soap. You can also use Fels Naptha (24 pack) or Zote soap but I haven’t tried them. Don’t use Dial or other bars as many are technically detergents, not soaps.


  1. Cut the bar of soap into bite sized pieces and put it in your blender or food processor with the borax and washing soda.
  2. Blend/process until well powdered. I had to scrape the sides once since the Ivory gets stuck at first, but it will turn to powder pretty fast. When you’re done be sure to clean the soap out of your food processor well, I’ve heard that it has the same basic effect on your digestive system as coffee after a large meal.

Use 1 tbsp per load for high efficiency washers, 2 tbsp for normal top load washers. It will produce fewer suds than normal soap, but this is fine. Total cost is around $1/batch and it will last about 40-50 loads for a HE washer, or 20-25 loads for a normal one. We have been using it for a while and have noticed that it actually works better than the commercial stuff. Some stains that we thought were persistent have slowly been coming out after we switched.

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