Preheat the oven to 350 degrees.
Spray a 9X9 cake pan with non-stick cooking spray and lay a piece of parchment paper in the pan so you can remove the cake easily once it’s baked.
Mix the spice cake mix, pumpkin puree, eggs and cinnamon together. (Do not follow the ingredients recommended on the cake mix box, just what's listed here) Mix until just combined but be sure to scrape down the edges and bottom of the bowl with a spatula, dry ingredients will hide in pockets of the batter.
Fold in the chocolate chips.
The batter will be very thick so use a spatula to scrape it out of the bowl into the prepared pan.
Smooth out the top of the cake batter evenly then bake for 25-30 minutes or until a toothpick inserted comes out clean.
While the cake is baking, make the cream cheese frosting by creaming together the butter and cream cheese.
Then add the vanilla extract and powdered sugar (gradually) and mix until smooth.
Once the cake is done baking, remove from the pan and allow it to cool completely on a wire rack before frosting.
Use an offset spatula to ice the cake. Sprinkle on cinnamon and extra chocolate chips to decorate!