I wanted to make a pumpkin coffee cake one night, but never found a recipe I liked the looks of. So, I made my own. It turned out to be more like a bread pudding, but it was a HUGE success! My dad ate 3 LARGE pieces!
Cake: Preheat oven to 350*F. Mix together dry ingredients. Cut in butter, until it resembles course meal. In a separate bowl combine milk, pumpkin, eggs, and vanilla. Add liquid mixture to dry mixture. Mix until dry ingredients are wet. Spread in greased 9x13 pan.
Topping: Mix Dry ingredients. Cut in softened butter. Should be crumbly. If needed you can adjust the amounts of butter and flour sugar mixture to make it desired crumblyness. :P Sprinkle Crumb Topping on the cake. Sprinkle chopped walnuts. Bake for 40 minutes. Serve Warm. Refrigerate leftovers. Enjoy it with a nice hot cup of coffee!