Preheat your oven to 350 degrees and grease a 9×13 baking pan.
“Dump” all your cake ingredients together in a bowl and mix until blended and place in oven.
Bake cake for 30-35 minutes, pull out when done and let cool.
While cooling, start making your icing. Combine milk, butter, and sugar in a saucepan and heat until boiling. Let boil 1-2 minutes, stirring constantly. Once boiling, add butterscotch chips and continue to stir until melted.
Note: I had a hard time getting all the butterscotch chips to melt, so I actually ran my topping through a strainer to catch any of the unmelted chips. Then I poured the entire hot mixture over my cake.
Optional: If you want a salted caramel apple dump cake, lightly sprinkle course salt over top of the cake once cool for a nice salted flavoring to compliment the sweetness.