Grease 9 x 13 pan

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

Combine remaining cake mix, melted butter and egg. Press this into bottom of pan.

FILLING:

2 c. pumpkin pie mix (ready can mix)
2 eggs
2/3 c. milk

Combine and mix until smooth. Pour over crust.

TOPPING:

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

Mix. Cut in until all crumbly. Put on top and may add chopped nuts. Bake at 350 degrees about 45 to 50 minutes. cut in squares and top with Cool Whip.