Cake Mix Pumpkin Dessert

1 box yellow cake mix
1/2 cup butter
1 egg

Mix cake mix, butter, and egg. Reserve 1 cup mixture for topping. Press the rest into bottom of 9X13 pan.

FILLING
2 cups pumpkin
1 tsp. vanilla
2 1/2 tsp. pumpkin pie spice
1/2 cup brown sugar
salt
2 eggs
1/3 cup milk
1/2 cup sugar

Mix and pour over crust.

Topping: Mix reserved cake mix mixture with 1/4 cup butter and 1 tsp. cinnamon. Sprinkle over top. Bake at 350 degrees for 1 hour and 5 min. Serve with whipped cream or ice cream.