Preheat oven to 350 degrees. Spray a 13x9 inch pan with non-stick spray and line with parchment paper or tin foil.
In a large mixing bowl, whisk together the flour, pumpkin pie spice, cinnamon, baking soda and salt and set aside.
Using mixer, cream the butter, granulated sugar and brown sugar. Beat until light and fluffy.
Add in the egg, pumpkin and vanilla and mix together well.
Using mixer on low, slowly add in the dry ingredients and mix until just combined. Don't overmix.
Fold in the chocolate chips until well distributed evenly.
Pour the batter into the lined baking pan and smooth until even.
Bake for 35-40 minutes or until a toothpick comes out clean.
Let blondies cool completely before frosting.