Cheesecake Brownies

Preheat oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper.
Prepare the brownie batter: In a bowl, whisk together melted butter, sugar, eggs, and vanilla until smooth.
Sift in cocoa powder, flour, salt, and baking powder, then mix until combined. Pour most of the brownie batter into the prepared pan, reserving a few tablespoons for swirling.
Prepare the cheesecake layer: Beat softened cream cheese, sugar, egg, and vanilla until smooth and creamy.