I made an ice cream cake using the chocolate cake mix. Once the cake cools completely, carefully cut the cake in half using a serrated knife. Place the bottom half back in the pan and cover it with softened vanilla ice cream. Sprinkle some toffee chips (or any broken up candy you like) over the ice cream. Press the top half over the ice cream mixture and frost the cake with softened Cool Whip. Place back in the freezer to set. When you're ready to eat, leave it on the counter for about 30 minutes so it's easier to cut.
I'm looking forward to making an apple crisp using the yellow cake mix - sprinkling it over some sliced apples with some brown sugar, cinnamon, and nutmeg. Drizzle some butter over the top and bake at 350 for 30 minutes. I'm sure it'll be delish and perfect for the season!