1 box yellow cake mix (reserve 1 c.)
1/2 c. butter
1 egg
1 lb. 14 oz. can pumpkin pie mix
2 eggs
2/3 c. evaporated milk
1 c. reserved cake mix
1/2 c. sugar
1 tsp. cinnamon
1/4 c. butter

Mix and spread bottom of pan with cake mix, 1/2 cup butter and 1 egg.

FILLING: Pumpkin pie mix, egg, and milk

TOPPING: Mix 1 cup reserved cake mix, sugar, butter, and cinnamon. Crumble and sprinkle over cake. Bake at 350 degrees for 1 hour. Top with Cool Whip.