Mom’s Super Laundry Sauce Recipe

Step 1

Put 4 cups of water in a large heavy saucepan over high heat. While that is heating, mix the borax and washing soda together in a bowl, mixing well, set aside.

Step 2

Grate the Fels Naptha- the easiest way to do this is to cut it into several smaller chunks and then run it through a food processor- otherwise, you can just grate it with a hand grater or shave it with a knife.

Step 3

Add the freshly grated soap to the water in the saucepan, stirring almost constantly. Reduce the heat to medium, It will take approximately 10 – 15 minutes for the Fels Naptha to complete dissolve. If it takes longer, your heat wasn’t up high enough. Alternatively, you can melt the fels on the stove over low heat without water then add the water afterwards, stirring it in, as the original recipe called for!

Step 4

It should be a rolling, simmering boil where you must stir constantly but it does not foam heavily or seem to “creep up” the saucepan.

Step 5

Once the Fels Naptha has completely melted, remove the pan from the heat and add in the Borax and the Washing Soda, stirring constantly until the powders are completely dissolved, this will take about 3-5 minutes.

Step 6

Pour the liquid equally into (2) 1 quart Mason jars.

Step 7

Add just enough water to bring the contents up to the “shoulders” or Rounded part of the jar, leaving approximately 1 ½ inches of headspace.

Step 8

Put the lid on the jars and turn them UPSIDE DOWN and let them sit a few hours (about 4 – 5 hours). The reason for this is that the soap is going to Separate into layers while it’s resting and occasionally will form crystals on the bottom. Rather than waste these trying to scrape them off, in the next step we’re going to incorporate them easily! By the way, if you leave it overnight it will have a slightly grainier texture than if you whip it immediately after 4 hours.

Step 9

There are two ways to do this next step, depending on what you have for equipment. Here’s how I like to do it- unscrew the blade and bottom from your blender and screw them onto your regular mouthed mason jar containing all of your ingredients.

Step 10

Place the entire mason jar on the blender and whip until smooth and creamy throughout, about a minute. Flip back over, unscrew the blender blade, attach a cover and seal.

Step 11

If you don’t have mason jars or a blender, pour the contents of your settled jar into a large bowl, be sure to scrape down any remaining from the jar to get it all. Using a Hand mixer, Whip the ingredients until light and fluffy and well blended. Transfer the ingredients back into the jar, cover, and store until needed. If you like, add a tsp of glycerin per jar.

Step 12

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. The detergent is Smooth and creamy with the same Look and consistency of Mayonnaise. Be sure to label the jar to prevent accidental ingestion!!