Directions :
Heat oven 350 degres F . Spraying 9″ 13″ pan with non-stick cook spray.
In a large bowl with an electric mixer, beat cake mix, apple pie spice, water, oil, eggs and vanilla on medium speed for 2 minutes.
Use a rubber spatula to fold the apple pie filling.
Pour mix to prepared skillet.
Bake in a preheated oven for 28-33 minutes.
Transfer cake to wire rack and leave to cool for 10 minutes.
Poke a warm cake every inch or so with a straw, halfway into a cake. Put 3/4 cup of the caramel sauce on the cake, letting it fill in the holes. The cake has cooled completely.
Cover the cake with the whipped topping, the toffee pieces and the remaining 1/4 cup of the caramel sauce.
Cover the remaining caramel apple cake and refrigerate for up to 3 days.
Enjoy !