In a medium bowl, whisk butter, buttermilk, pumpkin, and egg until smooth. Add flour, baking powder, salt, sugar, and spices to bowl and whisk until batter is smooth and just combined.
Heat a nonstick skillet to medium-high heat. Cook batter in batches by 1/4 cupfuls 1-2 minutes each side or until golden. Serve pancakes warm with maple syrup and enjoy!