In a large mixing bowl, combine the flour, baking powder, salt and pumpkin pie spice and stir until combined.
Crack the egg and add to the flour mixture, lightly beat until yolk is broken.
Add the milk, melted butter, pumpkin pure and brown sugar and mix until combined. If the mixture is very thick, you can thin it with a splash of milk.
Heat a griddle on medium-high heat. Spoon pancake mixture into the pan forming large circles. As soon as you see tiny bubbles form on the pancakes, flip and continue cooking until lightly golden.
Serve with maple syrup or whipped cream. Sprinkle with cinnamon (optional).