- Preheat oven to 350 F and grease a 9 in square pan.
- Sift together the first 3 ingredients.
- Melt the butter and in a medium bowl mix together with the puree, egg, vanilla, baking soda, salt, and pumpkin pie spice.
- Slowly mix the dry ingredients into the wet ones. Mix until smooth. Then stir in the chocolate chips.
- Transfer to the pan and bake in oven 18-20 minutes. Allow to cool and slice into 16 servings.