Preheat oven to 350ºF. Grease a 9×13 baking dish and set aside.
Prepare brownie mix as directed on the package. Set aside.
In a separate bowl, mix the butter, sugar, brown sugar, pumpkin puree, pumpkin pie spice, and vanilla.
In another bowl, mix together the salt, baking soda, and flour. Add it to the butter/ sugar mixture little by little until the dough is formed.
Fold in the pumpkin and chocolate chips. Now you have your cookie dough.
Pour the brownie mixture into the bottom of the baking dish.
Next, drop tablespoon sized balls of cookie dough on top of the brownie layer. I used a medium cookie scoop to do this. I tried to evenly place them on top of the batter. Spread lightly with a knife or spatula.
Bake for 30-35 minutes, until a toothpick inserted comes out clean. Store in an airtight container for 3-4 days.