CRUST:

1 pkg. Pillsbury yellow cake mix
1/2 c. butter, melted
1 egg

TOPPING:

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

FILLING:

3 c. pumpkin pie mix (Libbys)
2 eggs
2/3 c. evaporated milk

Grease bottom only 9 x 13 pan. Reserve one cup cake mix for topping. For crust, combine remaining cake mix, butter, egg. Press into pan. For filling, combine all ingredients until smooth. Pour over crust. For topping, combine ingredients and sprinkle over filling. Bake at 350 degrees for 1 hour. Serve with dollop of Cool Whip.