Line 9 x 13 baking pan with parchment and spray with nonstick cooking spray
In a mixing bowl, whisk together all-purpose flour, pumpkin pie spice, cinnamon, salt, and baking soda
In a separate mixing bowl, cream together butter and brown and white sugars, until well combined. Finally, mix in pumpkin purée. The mixture may look curdled, that's ok.
Using a mixer, on low speed, combine wet ingredients with dry ingredients just until evenly mixed. Fold in chocolate chips.
Evenly spread out the batter in a baking pan. Bake until edges start to pull away from the pan, about 35-40 minutes. A toothpick test in the center should only yield a few crumbs.
Cool completely in baking pan
Can be stored in an airtight container for 3 days.