Preheat the oven to 350℉ and line a baking tray with parchment paper, set aside.
In a small mixing bowl add the brown butter, pumpkin puree, brown sugar, vanilla and stir until smooth.
Add the flour, baking soda, salt, pumpkin spice and stir until combined. The dough will seem sticky which is fine.
In another bowl add the cinnamon powder and sugar, stir until combined. Scoop the soft dough into your hands and create a rough ball, drop into he cinnamon sugar and roll around until coated.
Transfer to the lined baking tray and bake in the oven for 14 minutes or until risen, dry to the touch on the outside and if you press it - the cookie is still soft.
Allow to cool on a wire rack and serve warm with a glass of cold milk.