Beat butter and sugar with a mixer. Add egg and mix well.
Whisk together flour, baking powder, baking soda, nutmeg, cinnamon and salt in a medium bowl. Alternate spiced flour and pumpkin puree, blending well after each addition. Fold in chocolate chips and vanilla.
Drop cookies onto cookie sheet and bake at 375 for 14-16 minutes. Cool on a rack. Once cooled, frost with icing (see below) and sprinkle with Pumpkin Spice
Icing
In a small bowl add the melted butter, powdered sugar, vanilla, and 2 tablespoons of milk. Stir well to combine. Add more milk if desired to create a semi-stiff icing. Ice the cooled cookies and sprinkle with pumpkin spice.