01 - Set the waffle iron to preheat following the manufacturer's guidelines.
02 - Whisk together all-purpose flour, baking powder, baking soda, fine sea salt, matcha powder, ground cinnamon, and granulated sugar in a large mixing bowl until thoroughly blended.
03 - Whisk together pumpkin purée, eggs, milk, melted butter or coconut oil, and vanilla extract in a separate bowl until the mixture is smooth.
04 - Pour the wet mixture into the bowl with dry ingredients and gently fold together until just combined, retaining a few small lumps to ensure tenderness.
05 - If necessary, lightly grease the waffle iron. Portion approximately 1/3 to 1/2 cup batter onto the preheated grids, adjusting for the waffle iron's size.
06 - Close the waffle iron and cook until the waffles are golden brown and crisp, approximately 3 to 5 minutes per batch or according to manufacturer instructions.
07 - Serve the waffles warm. Optionally, garnish with maple syrup, whipped cream, or a dusting of matcha powder for added flavor.