In a large bowl, combine pumpkin, milk, melted butter, egg, and brown sugar. Whisk until well combined, and the mixture is of even consistency.
In a separate bowl, combine dry ingredients: flour, baking powder, cinnamon, ginger, nutmeg – mix well to combine.
Add dry ingredients to wet ingredients and whisk until just combined.
Heat up a griddle to medium heat, grease lightly if necessary. Use ¼ measuring cup to ladle each pancake on the griddle. Cook until golden brown, flip to the other side, and cook until golden brown on the other side.