M.L.
Mine is similar to the one in the post below:
1/3 bar soap (Fels Naphtha, Zote, Ivory)
1/2 cup Arm & Hammer washing soda (not baking soda)
1/2 cup 20 Mule Team Borax powder
You need a two-gallon bucket (preferably with a top). I use a big kitty litter bucket - well cleaned, of course.
Grate the soap and put it in a saucepan. Add 6 cups of water and heat it until the soap melts. Add the washing soda and the borax, and stir until they are thoroughly dissolved. Remove from heat. Pour 4 cups of hot water into the bucket. Add your soap mixture and stir. Then add 1 gallon plus 6 cups (22 cups) more of water, and stir. Let the soap sit for about 24 hours before using it. It will gel, but not solidly; it will look watery, rather like an egg noodle soup.
Use 1/2 cup per load of laundry. It works well for hot, warm, and cold water loads. It is low-sudsing, so don't be disappointed if it doesn't look like the stuff in the detergent commercials.
The thing I've been playing with is that the recipe calls for 1/3 bar of soap. However, soap comes in different sizes and weights. I use 1/3 bar of Zote (because it gives a nice pink color to the product). However, the bars of Fels Naphtha I get are about 1/3 the weight of the Zote bars, so I've been using a full bar when I use that. I'm trying to see how little soap is needed in the mix to get the clothes clean. The jury is still out on that.
This recipe doesn't take too long to make, once you know what you're doing. You just need to make it up in time to let it sit. I have found it gets clothing just as clean as anything I can spend money on at the store. So far I've been able to get all the ingredients from King Soopers/Kroger stores (you may need to look up online to see what their stores in your area are called).