Blot pumpkin puree with paper towels, pressing and replacing until it is visibly darker and denser and paper towels come away mostly dry. Measure 6 tbsp after blotting.
In a medium bowl, whisk melted butter, both sugars, vanilla, and blotted pumpkin until smooth.
In a large bowl, whisk flour, salt, baking powder, baking soda, cinnamon, and pumpkin pie spice together.
Pour wet into dry and stir until just combined. Fold in chocolate chips. Dough will be very soft.
Cover and refrigerate at least 30 minutes.
Preheat oven to 350 degrees Fahrenheit. Line baking sheets with parchment.
Scoop 1 and 1/2 tbsp portions, roll into balls, place 3 inches apart. Slightly flatten each with the back of a spoon. Press extra chips into the tops.
Bake 11 to 12 minutes until edges are set. Centers will look soft — that is correct.
Cool on the baking sheet at least 10 minutes. Transfer to wire rack and cool completely. Flavour and chewiness are best on day two.