Preheat oven to 350.
2. Crust: Combine dry cake mix (minus 1 c), melted butter, and 1 egg.
3. Pat into a 13x9 cake pan.
4. Filling: Combine pumpkin, 3 eggs, brown sugar, milk, vanilla, and cinnamon.
5. Pour over crust.
6. Topping - Combine 1 c dry cake mix, 1/4 c softened butter and & 1/4 c sugar. (May use a little more butter if necessary.)
7. Mix together well and spoon over filling.
8. Bake at 350 for 40-50 minutes until topping is golden brown.