Oreo Cheesecake Brownies

Preheat oven to 325 F. Line a 8×8 pan with parchment paper and spray.
Start by melting the butter and 1½ ounces of chocolate chips together in the microwave. I start with 30 seconds and then stir, continue in 15 second intervals until melted.
In a medium mixing bowl, mix melted butter/chocolate with sugars. Add the egg and vanilla and mix again.
Whisk in cocoa powder, salt and flour. Pour batter into the bottom of the pan. Set aside.
Place cream cheese and sugar in a mixing bowl and beat them together on medium/low. You can use a stand or hand mixer. Add sour cream, vanilla and salt and beat in. Make sure it is completely smooth.
Gently fold in egg. You do not want to over mix this part. Fold in oreo cookie pieces.
Pour cream cheese mixture over brownie batter. Bake for 33-35 minutes, or until there is a slight jiggle in the center of the cheesecake. When done baking, turn off the oven, open the oven door and allow the cheesecake to cool in the oven for about 30 minutes. Remove from the oven and set on the counter to get to room temperature.
When completely cooled, cover the cheesecake and place in the fridge for at least 3 hours to set up.