If making my homemade caramel sauce, make it first so it's set aside to cool while you work on the rest of the recipe. 1/2 cup homemade caramel sauce
Preheat oven to 350 degrees F.
Make the apple pie filling: Peel, core, and chop the apples. Melt butter and cinnamon in a saucepan over medium heat, then stir in apples, sugar, and water. Cover and cook for 5-6 minutes, uncovering to stir every minute. In a small separate bowl, whisk together cornstarch with water. Add to the apples while stirring continuously. Remove from heat once the filling is thickened and bubbling.
4 green apples, 2 tbsp butter, 1 tsp cinnamon, 5 tbsp granulated sugar, 1/4 cup water, 1 tbsp cornstarch
Transfer the apple pie filling mixture to a 9x13 pan, and spread evenly.
Drizzle 1/2 cup of the caramel sauce over the filling mixture evenly.
Sprinkle the cake mix over the filling. Do not mix.
12 oz yellow or vanilla cake mix
Pour melted butter over the cake mix evenly, trying to cover as much of the cake mix as you can.
3/4 cup butter
Bake for 45 minutes until golden brown on top and bubbly on the sides.
Cool slightly and serve warm with whipped cream, vanilla ice cream, and/or more caramel sauce.