Pastry: 1 Pkg Yellow Cake Mix, ½ cup melted Margarine, and 1 Egg. Blend above ingredients, then save 1 cup for topping recipe. Press the rest into bottom of 9x12 in baking dish.
Filling: 1 large can Pumpkin, 1 can Canned Milk, 3 Eggs, 2/3 cup Milk, ½ cup Brown Sugar, 1 teaspoon Pumpkin Spice. Blend ingredients and pour over pastry.
Topping: 1 cup reserved cake mixture, ¼ cup Brown Sugar, ¼ cup margarine, ½ cup chopped Pecans. Blend together & drop on top of filling, and then sprinkle with cinnamon.
Bake at 350 degrees for 50 to 60 min. until done. Top with Cool Whip if desired.