Pumpkin Pie Squares

Crust:
1 pkg yellow cake mix (reserve 1 cup)
1/2 cup butter
1 egg

Filling:
3 cups pumpkin pie mix
2 eggs
2/3 cup milk
OR
1 c. brown sugar
 2 1/2 T pie spice
with plain pumpkin

Topping:
1 cup reserved cake mix
1/2 cup sugar
1 tsp cinnamon
1/4 cup butter

May desire whipped cream on top.

Grease 13x9 pan. Reserve 1 cup cake mix for topping. Combine rest of cake mix, butter and egg, and press into pan.
Prepare filling, stirring until smooth. Pour over crust.
Mix topping until crumbly and sprinkle over the filling - or melt butter separately and pour over
Bake at 350 for 45 minutes. 55 to 60 minutes.