I have been making my own laundry detergent for a few months now...it saves me SO much money, and works really well for our household.
These are the ingredients....Washing SODA, Borax and Ivory Soap bars (although I am sure you could use any soap bar depending on your fragrance desired--we use Ivory because I can get 10 bars at the dollar store for $4)
1/2 cup borax
1 cup washing soda
1 grated bar of soap
I usually triple this to make at one time to fill the jar below.
Grate bar of soap and combine with other ingredients. Then, I put it all through the food processor to grind fine. ( I find this helps for the soap flakes to dissolve in our washer ).
I usually use 2-3 teaspoons (and keep a spoon right in the jar) per load. 2 for a medium load and 3 for a large load, but you can adjust as needed.
Next I want to try making my own dishwasher detergent (but I have some store bought to finish), and then move into making my own cleaning products. I have this book that I bought in Philadelphia that tells you all products to make using natural items and essential oils. LOVE it!