I am not sure where this original recipe came from. I have seen it in many different places on the internet. I want to share it because it has worked so very well for my family. It makes a powder that is easy to store and not heavy to deal with.
1 bar Fels Naptha soap (or equivalent laundry soap like Octagon, 1-2-3, etc.)
1 cup Washing Soda (not baking soda)
1 cup Borax
Grate the soap. Mix together slowly with powders (you don’t want to get sloppy so you don’t make a mess or accidentally inhale this).
Store in a small container with a lid (I use an old coffee canister. Use 1 tablespoon per load. If it’s a horrible load of nasty kid stuff, use 2.
This works well. The soap shreds will work their way to the top of the container, so I just stir from the bottom when I measure my tablespoon.
We make double batches in just a few minutes. If you use the 1-2-3 bars (a Mexican brand that works well and is inexpensive) they are double sized, so each bar counts as two anyway.
Hope you’ll give it a try! I save money on the laundry as well as the gas for a 25 minute drive to town to purchase it!