a medium bowl, combine pumpkin, oil, vanilla and milk until smooth.
then stir in sugar, baking powder, salt and pumpkin pie spice.
finally, gently stir in flour. mix just until combined. don't over mix. batter will be a little lumpy.
in a small bowl, combine the melted butter with the brown sugar, cinnamon and flour.
then stir in chopped pecans.
bake for about 35-40 minutes (or until a toothpick comes out clean).
using an 8 x 8 baking dish does make for a pretty thick coffee cake. if you want thinner pieces of cake, use a larger baking dish and adjust the cooking time accordingly. 