Judge me all you want, but yes, I made my own laundry detergent and I love it! It's incredibly cheap, pretty easy to make, and works just as well as the store-bought kind.
1 cup washing soda
1/2 cup borax (optional)
1 bar soap (I had Lever 2000 on hand, but any kind will work. This is perfect for that last bit of soap that's too small to use)
Approximately 3 gallons water
A large container with lid for storage
Cut bar of soap into small pieces. A box grater works really well for this.
Bring 4 cups of water to a boil.
Add soap gradually and stir to dissolve.
Add 3 gallons of warm water to storage container.
Add washing soda, soap solution, and borax (if desired).
Let detergent sit for 24 hours.
Use approximately 1 cup of detergent for a large load of laundry.
Sorry I don't have pictures of the finished product. I dragged the bucket into the laundry room and the lighting is terrible. The consistency of the detergent will depend on what kind of soap you used, and can range from water to firm like Jell-o. Just be sure to mix well before use.