Preheat the oven to 350 degrees Fahrenheit and grease a 9x13-inch baking pan with cooking spray, set aside.
In a medium-sized mixing bowl mix the brownie mix, mini chocolate chips, eggs, melted butter, and half and half until well combined.
In a separate bowl, use a hand or stand mixer to cream the cream cheese, brown sugar, and pumpkin pie spice until light and fluffy.
Beat in the egg and canned pumpkin into cream cheese mixture until a smooth batter forms.
Place ½ of the brownie mixture into the prepared baking pan and smooth it into an even layer with a spatula.
Layer the cream cheese mixture on top of the brownie layer, then place scoops of the brownie batter.
Use a butter knife, spatula, or toothpick to slightly swirl the pumpkin and brownie layers. Because the brownie batter is thicker than the pumpkin batter, you may need to scoop it up slightly to swirl the two together.
Sprinkle the top with additional mini chocolate chips, if desired.
Bake for 40-50 minutes in preheated oven at 350 degrees Fahrenheit or until the edges look set and begin to brown. A toothpick inserted in the middle should come out with just crumbs.
Serve warm or cooled to room temperature.