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Super Laundry Sauce


Homemade laundry detergent

Tips and Tricks, Troubleshooting & Other Thoughts and experiences:

Do NOT Use Baking Soda or Oxyclean in this recipe hoping it will be an added "Boost". Your jars will likely explode within 7-10 days in storage
This can be stored indefinitely. It does become slightly firmer but still melts fine in the washing machine water, both hot or cold. Be sure to store it with a lid on though, once it dries out, it's effectiveness is greatly reduced. Again, repurpose the lid from a container of parmesan cheese and you'll be good to go!
Fels Naptha Can usually be found in the Laundry Detergent Isle of the Grocery Store for about $1 a bar, or it can be found online here.

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Super Laundry Sauce 1 Picture


  • 1 Entire 5.05oz Bar of Fels Naptha Soap (Some of our Aussie Friends have use SARD Wonder Soap in place of fels)
  • 3 c. water
  • 1 cup 20 Mule Team Borax Powder
  • 1 cup Arm & Hammer Washing Soda (not Baking Soda)
  • 2 one quart mason jars


Adapted from


Step 1

Unwrap the Fels Naptha soap and cut the bar in half. Take (1) half of the bar and slice it, cutting it into pea sized chunks. Place all of those chunks into a 1 qt mason Jar. Cut up the other half and place those pieces in the second mason jar.

Add 1 1/2 cups of Boiling Hot Water to each jar, cover and leave it alone overnight. I literally just run a pot of water through my coffee pot and use that. This is what it will look like in the morning, if you cut the pieces up first:

The next day (or several days down the road, depending on your schedule!), open the jar, use a butterknife to make a "criss-cross" pattern to loosen the gelled fels naptha off the bottom when you whip it. Add 1/2 cup borax and 1/2 cup washing soda to each jar.

Add Enough Hot water to bring the level up to the "shoulder" of the Jar, (again, I actually just ran a pot of water through my coffee pot, because boiling water is a pain in the butt!) like so:

Note the Purple line to indicate the level your water should be at before you continue to the next step...

Carefully seat the gasket and blender blade onto the bottom of the jar. If the rubber gasket is wet or has any contents of the jar on it, it will get chewed up into your laundry soap.

Place the jar on the blender base and Whip until it is light and fluffy with the consistency of Creamy Mayonnaise.

How to Use the Homemade Super Laundry Sauce for Dummies: (View FAQ here)

To use, add 1 Tablespoon to a load of laundry in any type of machine, conventional, Front Loader, High Capacity & High Efficiency (HE), etc. Do not add the detergent to the "detergent compartment" but instead directly with the dirty clothes. (It WILL get stuck in the compartment, I can assure you!)

Be sure to label the jar to prevent accidental ingestion!! We have created these cute labels here if you'd like to Print them out to attach to your own Jars.

Here is EXACTLY how I use our detergent:

Fill the machine with dirty clothes
start the water, (hot- Cold- or warm- doesn't matter)
Measure out 1 Tablespoon (literally) of super laundry sauce
stick the measuring spoon of detergent under the running water, let it fall off the spoon.
Close the washer lid, go away and do something else while the machine runs.

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