In a large bowl, whisk together the flours, brown sugar, baking powder, baking soda, salt, cinnamon, ginger and allspice. In a medium bowl, whisk together the milk, eggs, pumpkin, oil and vanilla. Add the wet ingredients to the dry ingredients and whisk just until blended.
To make waffles: preheat your waffle iron, spray it lightly with nonstick spray or brush it with oil, and cook according to the manufacturers’ directions. (I use a scant ladleful – or about half a cup – per deep Belgian waffle.)
To make pancakes: preheat your skillet over medium heat; spray with nonstick spray or brush with butter or oil, and then wipe it off with a paper towel. (This way you’ll get your first pancake right, rather than the first one being a “tester”.) Ladle on about ¼ cup of batter and cook until a few bubbles start to break through the surface and the edges appear dry. Flip and cook until golden on both sides.
Keep pancakes or waffles warm in a 250°F oven while you finish cooking them. Serve warm topped with blueberries and maple syrup; leftovers can be popped in the toaster for a quick weekday breakfast.