This easy-to-make laundry detergent contains only 3 ingredients and does a super job. The recipe I found calls for the following:
1 bar of Fels-Naptha or Ivory, grated
2 c. Arm & Hammer Super Washing Soda
2 c. Borax
Mix well. If you have hard water, you may need to use 1/4 c. per load. I have soft water and can get away with using only 2 Tbs. per load. Either way, this is a cheap alternative to store-bought.
If you prefer a liquid detergent, my friend over at Nesting Place has a recipe for DIY liquid that she says works great.