First brown the butter in a pan. Set aside to cool to room temperature.
Press the pumpkin puree between a stack of paper towels to absorb the extra moisture.
When the butter is cool, whisk in the sugars, egg yolks, vanilla, and pumpkin until well combined.
Then fold in the flour, pumpkin spice, baking soda, and salt until just combined.
Scoop the dough into 3 tbsp sized balls and roll each on in cinnamon sugar. Bake at 350 for 9 minutes and enjoy!