In a stand mixer or mixing bowl with a hand mixer, cream together the butter, ½ cup sugar, and brown sugar until light and fluffy about 2-3 minutes. Add pumpkin puree, egg yolks, and vanilla extract and mix until combined.
Whisk the flour, baking powder, baking soda, salt, cinnamon, and pumpkin spice. Add dry to wet ingredients and mix. The dough will be soft.
Place the remaining sugar in a small bowl and use a 2 Tablespoon cookie scoop to measure the dough and drop into a into the ball. Roll the dough in the sugar and place on baking sheet lined with parchment paper about 2 inches apart.
Bake at 350 degrees for 10-12 minutes until the edges begin to brown. Allow the cookies to rest on the baking sheet for 5 minutes then transfer to a wire rack to cool.