I make our laundry soap also, same basic formula as has been mentioned, but I've made it 3 different ways. One way produces a gel like substance, another produces something that looks like a whipped lemon yogurt, and the final is the powdered version. By far the powdered version is the easiest and quickest to make. Of the 3 options the first and last dissolved easiest in the wash. The first required, by far, the most energy input to make it. They all clean just dandy.
We have a top loader, other machines might work differently with the above products.
TT1, when I make it I shred the soap into the finest shreds my food processor will make. Then I mix the powders and the shreds, then put approx' 2 cups at a time into the Vita-Mix for a few seconds of blending. The result is a fine powder with no lumps. This last time I made 10 batches which will last us a very long time. I put it in a food grade icing bucket from the supermarkets baking section.
[Image: laundry%20soap_zpsqf6kqdlx.jpg]
You might see lumps in it but touch one of those lumps and it instantly turns to dust.
Just yesterday I figured out what it takes to make 10 batches; two boxes of washing soda, one box of borax, and 10 bars of Fels-Naptha is the basic ratio. It's not precisely the formula from the 'net, but the small difference is meaningless.
To add scent is super easy, just add some commercial laundry detergent to the load. But for fresh washed scent just hang it outside to dry. Hopefully not in air pollution, I have no idea what that result would smell like.
If anyone wants the 3 different formulas just PM me.
Brian. Lover of SE razors.