Mix:

1 yellow cake mix, minus 1 c.
1 stick (1/2 c.) melted butter
1 egg

Press into bottom of cake pan.

FILLING:

Mix:

3 c. pumpkin mix (1 can 1 lb. 13 oz.)
2 eggs
2/3 c. milk

Put over crust.

TOPPING:

1 c. reserved cake mix
1/2 c. sugar
1 tsp. cinnamon
1/2 c. firm butter (do not melt)

Sprinkle over filling. Bake at 350 degrees for 45 to 50 minutes. Chill. Cut into squares and top with Cool Whip.