Oven Preparation and Baking Sheets: Adjust the oven rack to the middle position. Preheat the oven to 350° F (175° C). Line two baking sheets with parchment paper or silicone baking mats.
Dry Ingredients Mixture: In a large bowl, thoroughly whisk together the all-purpose flour, salt, baking soda, baking powder, and pumpkin pie spice. Set aside.
Wet Ingredients Mixture: In a separate large bowl, vigorously whisk together the granulated sugar, dark brown sugar, and vegetable oil. Add the chilled pumpkin puree to this mixture and whisk until thoroughly combined. Incorporate the eggs and vanilla extract, continuing to whisk until fully combined.
Combining Mixtures: Gently sprinkle the flour mixture over the pumpkin mixture. Whisk until the mixture is completely homogeneous and no streaks of flour remain.
Forming Cookies: Utilize a cookie scoop (1.5-2 tablespoons capacity) to portion the dough onto the prepared baking sheets, spacing them approximately 1 inch apart.
Baking Process: Bake the cookies, one sheet at a time, for 10-12 minutes, or until a toothpick inserted into the center of a cookie comes out clean.
Cooling: Remove from the oven and allow to cool on the pan for about 10 minutes. Subsequently, transfer the cookies to wire racks to cool completely. Repeat this process with the remaining dough.