In a large bowl combine flour, baking powder, cinnamon, ginger, nutmeg and salt, set aside.
In a medium bowl, beat together eggs and brown sugar until light and fluffy, then beat in pumpkin, milk, molasses and melted butter. Gently fold egg mixture into flour mixture, until moist. Do not over stir the waffle batter.
Brush the iron with a little melted butter and cook according to manufacturers directions. Top with warm maple syrup and whipped cream or fresh fruit.