1 (32 ounce) can sliced peaches, with juice
1 (18.25 ounce) box yellow cake mix
Preheat oven to 350 degrees F.
Place sliced peaches in their juices in a 13 x 9-inch baking dish. Sprinkle DRY yellow cake mix on top. Dot top of coffee cake with butter, then sprinkle with cinnamon. Bake for 30 minutes at 350 degrees F.