Grease a 9x13 dish and place frozen peaches in it.
Sprinkle the box of cake mix over the peaches.
Slowly pour the can of soda pop over the cake mix. Do not stir.
Cover with foil and place in the oven to bake for 30 minutes. Remove foil and continue baking another 30-40 minutes until done. It will still be a little gooey inside and that's ok.