Prepare the waffle batter:
In a large mixing bowl, whisk together the flour, brown sugar, baking powder, baking soda, salt, and all the spices (cinnamon, nutmeg, cloves, and ginger). Stir well to evenly distribute the warm spices throughout the dry mixture.
Mix the wet ingredients:
In another medium bowl, combine the pumpkin puree, milk, eggs, melted butter, and vanilla extract. Whisk until the mixture is completely smooth and creamy. This ensures the pumpkin blends well and won’t create lumps in the batter.
Combine wet and dry ingredients:
Slowly pour the wet pumpkin mixture into the bowl with the dry ingredients. Stir gently with a spatula or wooden spoon until everything is just combined. The batter should be slightly thick but pourable—avoid overmixing, as this can make the waffles less fluffy.
Preheat the waffle iron:
Plug in your waffle maker and allow it to heat fully. Lightly grease it with butter or nonstick spray before cooking each batch to prevent sticking and to give the waffles a crisp golden edge.
Cook the waffles:
Pour about 1/2 to 3/4 cup of batter (depending on the size of your waffle maker) into the center of the iron. Close the lid and cook for 4–5 minutes, or until the waffles are golden brown and crisp on the outside. Repeat with the remaining batter, greasing as needed.
Keep waffles warm:
As you cook, you can place finished waffles on a baking sheet in a 200°F (95°C) oven to keep them warm and crunchy until serving time.
Serve and enjoy:
Serve your pumpkin spice waffles warm with butter and maple syrup. For extra fall flair, top with whipped cream, a sprinkle of cinnamon, or even candied pecans.