Weigh your soft white wheat berries and then mill them on the finest setting of your grain mill.
Whisk together the freshly milled flour, baking powder, baking soda, pumpkin pie spice, and salt.
In a separate bowl, whisk together the pumpkin puree, milk, eggs, olive oil or melted butter, brown sugar, and (optional) vanilla.
Add the dry ingredients to the wet ingredients and gently mix just until combined.
Lightly grease the waffle iron if needed and add the appropriate amount of batter for your waffle maker. Mine takes a heaping 1/2 cup.
Cook until golden brown and cooked through. The time will vary based on your waffle maker.
Transfer each finished waffle to a wire cooling rack while cooking the remaining batter.
Serve warm with butter and maple syrup, or try with whipped cream, chopped pecans or walnuts, a sprinkle of cinnamon, or even a few chocolate chips.