Combine pumpkin, milk, eggs, white sugar and seasonings. Mix well.
Pour pumpkin mixture over crust. Return to oven @350 for 20 minutes.
Meanwhile, prepare topping: pecans, 1/2c brown sugar and 2 TBS butter. Mix with fork until crumbly. Sprinkle over bars and return to oven @350 for 15-20 minutes. The topping is optional, but remember to add the additional cooking time if you do not add the topping.
Cool to desired serving temp. Or refrigerate until ready to serve. Cut into squares. Serving # will depend on how big you cut them.