1 pkg. yellow cake mix (reserve 1 c.)
1 egg
1/2 c. melted butter

FILLING:

3 c. pumpkin pie mix
2/3 c. milk
2 eggs

TOPPING:

1 c. reserved cake mix
1 tsp. cinnamon
1/4 c. sugar
1/4 c. butter

Grease bottom only of 9x13 pan. Combine cake mix (1 cup reserved) with egg, butter and press into pan. Mix filling and pour over crust. Combine topping ingredients, cutting in butter. Sprinkle crumbly mixture over filling. Bake at 350 degrees 45-50 minutes or until knife inserted comes out clean. Serve with whipped cream.