1 pkg. white or yellow cake, reserve 1 c.
1/2 c. melted butter
1 egg

Combine and press into a greased 9 x 13 inch pan (bottom only).

FILLING:

3 c. pumpkin pie mix that includes spices (Libby's 10 to 14 oz.)
2 eggs
2/3 c. milk

Mix filling until smooth then pour over first layer.

TOPPING:

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

Combine ingredients for topping together, sprinkle over filling. Bake at 350 degrees for 45 to 50 minutes. Do not overbake. (Insert until knife comes out clean.) When cool, top with Cool Whip.