Laundry Soap

11 Feb

*Brought over from the old blog*

I have had a lot of people asking about how I make our laundry detergent lately. It is a pretty standard recipe that I have seen around for awhile. It makes a great base and some have altered it by adding scents and other “secret ingredients” but the standard works fine for me.


Basic Recipe

This makes one batch equal to approximately 3 cups of powder detergent.

Use 1 TBSP per load. Use more for heavier soiled items.


1 bar of Fels Naptha soap

1 cup of Washing Soda (not baking soda)

1/2 cup Borax

First grate the soap bar on a cheese grater. Second, combine the grated soap and remaining ingredients into a food processor and mix until fine and combined.


I find all of these ingredients in the laundry aisle of Fred Meyer. You can order in bulk online various places and probably save even more money.


Borax is $3.00-$4.00 dollars depending on where you buy it, for a 76oz box.

Washing Soda is usually $4.00 for a 55oz box.

1 5.5oz bar of Fels-Naptha costs $1.25 as the most expensive per bar price I have seen. Amazon sells bars for $0.49!



(this is a 5 batch jar)


I broke it down and figured out that with one box of washing soda you can make 7 batches of detergent. You would need 7 bars of Fels-Naptha and only about a 3rd of the Borax. Using the higher of the cost estimates that would equal about $2.39 per batch of soap. One batch can wash approximately 48 loads of laundry. The cost breaks down to about $0.05 per load of laundry. Plus you have tons of borax left for other cleaning needs and future batches of detergent.


(my laundry soap, vinegar that I use as a fabric softener, baking soda and generic oxy-clean that is occasionally added for whites and linens)



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