01 -  Preheat the waffle iron according to the manufacturer's instructions. 
 02 -  In a large bowl, whisk together the flour, brown sugar, baking powder, baking soda, salt, cinnamon, ginger, nutmeg, and cloves until evenly blended. 
 03 -  In a separate bowl, whisk together the whole milk, pumpkin puree, eggs, melted butter, and vanilla extract until the mixture is smooth. 
 04 -  Add the wet mixture to the bowl of dry ingredients. Stir gently with a spatula until just combined, avoiding overmixing the batter. 
 05 -  Fold in the toasted chopped pecans evenly throughout the batter. 
 06 -  Lightly grease the preheated waffle iron with melted butter. 
 07 -  Ladle about 1/2 cup batter per waffle onto the hot iron, spreading gently if needed. Cook for 3 to 5 minutes, or until waffles are golden brown and crisp. 
 08 -  Serve waffles warm with additional toasted pecans and maple syrup.