I got this recipe from Ann Gast, who ran the Eldora Bowling Alley where Rog and I always used to bowl.

1 yellow cake mix
1 can apple pie filling
3 eggs, beaten

TOPPING:
1 C. nuts
1 T. flour
1 T. margarine
1/2 C. brown sugar

Mix the first 3 ingredients together. Put in a greased 9×13″ pan.

TOPPING: Crumble over cake batter. Bake at 350º for 35 minutes.