Preheat a waffle iron according to manufacturer's instructions.
Combine the flour, baking powder, baking soda, pumpkin spice, salt, and brown sugar in a mixing bowl.
In a separate bowl, stir together the pumpkin puree, milk, eggs, melted butter, and molasses (if adding).
Stir the flour mixture into the pumpkin mixture, stirring by hand just to combine.
Cook waffles according to manufacturer's instructions.
Add maple whipped cream (recipe below) and chopped pecans for a beautiful presentation.
*If you do not have pumpkin spice you can use the following spices: 4 tablespoons cinnamon, 4 teaspoons ground nutmeg, 1 teaspoon ground ginger, and 1 teaspoon ground cloves