Empty 1 yellow cake mix in bowl and set aside 1 cup for topping. Add 1/2 cup melted butter and 1 egg to mix and blend. Press into bottom of 9 x 13 inch pan. Set aside.

In separate bowl put 3 2/3 cup cooked pumpkin or 1 (29 ounce) can cooked pumpkin. Add 3 eggs, 1 teaspoon cinnamon, 1/2 cup brown sugar and 1/2 cup milk. Pour into pan with crust. For topping, blend 1 cup reserved cake mix, 1/2 cup granulated sugar and 1/4 cup butter. Crumble and sprinkle over pie. Bake at 350 degrees for 1 hour.