I found the recipe I used over at My Frugal Lifestyle. If you have never been there...you really should go. There are great beauty tips, cleaning tips, and much more. I love to see the new things I can do around my house with her tips.
What you need:
1 cup of Borax 20 mule team
1 cup of Arm and Hammer Washing Powder
1 bar of Fels-Naptha soap
** I had a hard time finding the first two ingredients. You can find them on line, or I had luck at my local Ace Hardware...one of the last places I would have ever thought to look.
Fill the pot with 6-8 cups of warm water. I used 6. Heat on warm until the soap has dissolved.
Transfer the detergent into containers. You will want to have several on hand. I used some clean tea jugs until I can acquire more detergent jugs.
My Frugal Lifestyle and check out her Q and A on this detergent. She says this is good for HE machines too, just in case you were wondering!