In a mixing bowl, add the cream cheese, sugar, flour, egg, and vanilla. Use an electric mixer to beat until combined.
Then, add in the pumpkin puree and cinnamon. Beat until just combined.
Spread this mixture on top of the brownie batter. Then, drop spoonfuls of the remaining brownie batter on top. Swirl them together with a knife.
Bake for 36 to 40 minutes or until a toothpick inserted comes out mostly clean.
Finally, remove from oven. Allow brownies to cool before slicing into.
Store in the fridge for up to 3 days.