Preheat the oven and prepare the pan: Preheat your oven to 350°F (175°C). Grease and line an 8×8-inch baking pan with parchment paper for easy removal.

Make the cream cheese layer: In a medium-sized bowl, beat together cream cheese and sugar until smooth. Add the egg and vanilla extract and beat until combined. Set aside.

Prepare the brownie batter: In a large bowl, whisk together the melted butter, sugar, brown sugar, and cocoa powder. Add the eggs and vanilla extract, and beat until smooth. Stir in flour and baking powder until just combined.

Add the Oreo cookies: Gently fold in the crushed Oreos into the brownie batter.

Assemble the brownies: Pour half of the brownie batter into the prepared pan and spread it evenly. Spoon the cream cheese mixture on top and spread it out. Then add the remaining brownie batter on top and spread it evenly. Sprinkle the chopped Oreos over the top for added crunch.

Bake the brownies: Bake for 35-40 minutes or until a toothpick inserted comes out clean or with just a few crumbs. Be careful not to overbake; the brownies should be fudgy.

Cool and cut: Let the brownies cool completely in the pan on a wire rack before cutting them into squares.