Cut together yellow cake mix and 1/2 cup butter

Peel and dice 2 1/2 cups of apples

Mix 1/2 cup sugar and 1 tsp cinnamon

Mix 1 cup sour cream, 1 egg, and 1 tsp vanilla

Pat cake mix mixture in a 9 x 13 pan. Bake for 10 minutes at 350 degrees

Arrange apples on crust. Sprinkle with cinnamon and sugar mixture

Pour sour cream mixture on top of all.

Bake another 25 - 30 minutes at 350 degrees until crust is lightly browned.