This recipe is called a dump cake because all of the ingredients are simply dumped into the baking dish and baked. Preheat your oven to 350°F and grease a 9x13 inch baking dish. Pour 2 cans of peach pie filling into the baking dish and spread evenly. Sprinkle 1 box of yellow cake mix over the top of the peaches. Cut 1 stick of butter into small pieces and scatter over the cake mix. Bake for 45-50 minutes or until the top is golden brown and the filling is bubbly. Serve warm with whipped cream or vanilla ice cream.