Wonderful served warm with vanilla ice cream.
1 Preheat oven to 375 degrees F (190 degrees C).
2 Empty peaches into the bottom of one 9×13 inch pan. Cover with the dry cake mix and press down firmly. Cut butter into small pieces and place on top of cake mix. Sprinkle top with cinnamon.
3 Bake at 375 degrees F (190 degrees C) for 45 minutes.