Make the topping first by mixing together the sparkling sugar, cinnamon, nutmeg, and chopped pecans. Set aside.
Whisk together the melted butter, milk, egg, and pumpkin puree until smooth.
Whisk in the baking powder, salt, and sugar.
Add the flour, and mix until well combined, but don't over mix..
Pour the batter into the prepared baking sheet and sprinkle the cinnamon/pecan topping evenly over it. (Note: I didn't use quite all of the topping, probably about 3/4 of it. But you can use however much you'd like!)
Bake for 20-22 minutes until slightly risen and fully cooked in the center.
Remove from the oven and allow to cool just slightly before slicing and serving.
Serve with butter and maple syrup, or other topping of your choice.