Preheat oven to 350°F. Spray a 9"x5" loaf pan with nonstick spray.
In a large bowl, mix the flour, sugar, spices, baking powder, baking soda and salt. In another bowl, whisk together the pumpkin, oil, milk, eggs and vanilla.
Add the wet ingredients to the dry along with a few handfuls of chocolate chips and/or nuts, if you're so inclined, and stir just until the batter comes together.
Scrape into the prepared pan and bake for an hour, until the top is cracked and springy to the touch.