Preheat oven to 350.
Mix applesauce, cake mix and oil together in a medium size bowl. Follow the instructions on the box for pan size and cooking times. If you have eggs but you don’t have any oil, you can use applesauce to replace the 1/3 cup of oil. You will still need the eggs and the water. Experiment with using more applesauce and fewer eggs if you want to.