Make Your Own Laundry Detergent : 3 Steps (with Pictures ...
Grate the soap, grind it to a powder in your little processor in 2 batches, and then grind the 1 cup of soda crystals to a fine powder. You don't need to grind the baking soda. Just mix it all together in a tub, shouldn't take more than a couple more minutes to do it like that.