1Preheat oven to 350 degrees F (175 degrees C). Set aside 1 cup cake mix for the topping. Combine remaining cake mix, 1 egg, and melted butter or margarine. Pat into a 9x13 inch baking pan.
2In a large bowl, mix pumpkin, 2 eggs, spices, 1/2 cup sugar, and milk. Pour pumpkin mixture over the cake mix crust.
3In a small bowl, combine 1 cup cake mix and 3/4 cup sugar. Cut in 1/2 cup softened butter until mixture resembles coarse crumbs. Sprinkle mixture on top of pumpkin mixture.
4Bake at 350 degrees F (175 degrees C) for 55 minutes.