In a medium bowl, combine the flour, sugar, baking powder, pumpkin pie spice, baking soda, and salt. Stir with a whisk to combine.
3 cups flour, 2 tablespoon sugar, 1 ½ tablespoons baking powder, 1 tablespoon pumpkin pie spice, 1 teaspoon baking soda, 1 teaspoon salt
In a separate large bowl, combine the buttermilk and pumpkin. Stir with a whisk until combined.
3 cups buttermilk, ½ cups canned pumpkin purée
Add the flour mixture to the pumpkin mixture and stir just until you no longer see dry ingredients.
Preheat your waffle maker and lightly coat it with butter or cooking spray, if needed. Add the batter (check the waffle maker's instructions for correct amount) to the center, close the lid and cook until golden brown and crisp, about 3–5 minutes or until your waffle maker signals it’s ready.
Serve with butter, warm maple syrup and your choice of additional toppings.