All you need is 1 cup super washing soda | 1 cup Borax | 1 cup grated soap (I used Fels Naptha).
All the recipes that I found had twice as much soap as soda or Borax, but I felt that was too much so I adjusted and it works just as well. You toss about 2tbsp in with your wash and it gets clean and smells good. If you want to check out the blog I got my information from, she talks about what the different ingredients do for your laundry. She also has lots of other recipes for making things from scratch in your home. FYI: 1 bar of soap = 2 cups grated.