Add apple slices into an even layer in a greased 9x13 pan.
Pour orange juice over apples.
In a small bowl, stir together sugar and cinnamon. Sprinkle evenly over apples.TIP: The cookie mix typically comes with a spice packet. You'll want to add this with the cookie mix and oats.
Stir together cookie mix and oats in small bowl. Spread evenly over apples.
Drizzle butter over cookie mix and oat mixture, so that no dry mix is visible.
Bake for 60-75 minutes or until topping is golden and apple mixture is bubbly.