Preheat the oven to 350°F (175°C).
Grease a 9×13 inch baking dish with butter or non-stick spray.
Spread both cans of apple pie filling evenly in the bottom of the prepared baking dish.
Sprinkle the Krusteaz Cinnamon Swirl Cake Mix evenly over the apple pie filling.
Sprinkle 1 teaspoon of ground cinnamon evenly over the cake mix layer.
Pour the melted butter evenly over the top of the cake mix and cinnamon.
Bake in the preheated oven for 40 to 45 minutes, or until the top is golden brown and the filling is bubbly.
Remove from the oven and let cool for 10 minutes before serving.