In mixer, beat butter until smooth.
Add sugar, pumpkin, vanilla extract, baking powder, pumpkin pie spice and salt. Beat until well combined, about 2 minutes.
Add egg and combine.
Add flour and mix. Cover and refrigerate about two hours.
Preheat oven to 350°F degrees.
Combine remaining sugar and pumpkin pie spice in a bowl.
Scoop dough and form into a ball. Roll in the pumpkin pie spice/sugar mixture.
Place on greased baking sheet and bake for approximately 10 minutes.