Very slightly adapted from
Annie’s EatsNotes:
I used light cream cheese which worked out nicely. However, regular cream cheese would make for a richer brownie.
Although you can stick a knife in to assess if the brownies are done, you will still see some batter when you pull it out. Since the cream cheese mixture stays moist, it is a little more tricky than usual. I suggest moving the pan from side to side to see if they are firm.