What you will need:
1 cup castile soap (finely grated)
1/2 cup Borax
1/2 cup baking soda
1/2 cup washing soda
Mix all of the ingredients thoroughly in the jar and make a label if you like. It should make about 20 loads worth. I use 2 tablespoons for my top loading washer.
My cost for supplies was: $3.53 for one jar of laundry soap ~ 20 loads or $.18/load
$2.69 Washing Soda
$.50 Baking Soda
$2.99 Dr. Bronner's soap (on sale at Kroger) - used full bar
After making the detergent, I've decided that it is pretty cost effective, but so is buying Crunchy Clean. Crunchy Clean costs about the same amount as if I make my own laundry soap, but it comes in a bunch of fun scents, and it doesn't require any time or effort. So most likely I will keep buying Crunchy Clean, however, it was a good experience to try making my own soap!