Preheat oven to 400 degrees. Line a 12 cup muffin tin with liners or spray well with non-stick spray.

In a large bowl whisk together flour, sugar, baking powder, baking soda, cinnamon, pumpkin pie spice, nutmeg and salt. Set aside.

In a separate bowl mix together pumpkin, butter, and eggs until smooth. Pour into flour mixture and mix until just combined.

Divide evenly into prepared muffin tin. Bake for 18-20 minutes until a tester comes out clean.

Remove from oven and let cook for 5-10 minutes before removing to a wire rack.

In a small bowl combine sugar and cinnamon for the coating. Brush the top of the muffins with melted butter. Roll in the sugar mixture to coat. Place on wire rack to cool completely.