01 -
Preheat the oven to 350°F (175°C). Grease a 9-inch springform pan and line the bottom with parchment paper.
02 -
In a large bowl, combine melted butter and melted chocolate chips, stirring until smooth. Add granulated sugar, brown sugar, and cocoa powder; mix until well incorporated. Stir in vanilla extract and eggs, one at a time, mixing well after each addition. Add baking powder, salt, and flour; mix until just combined.
03 -
Pour the batter into the prepared pan, spreading it evenly. Bake for 20-25 minutes, or until a toothpick inserted into the center comes out mostly clean. Remove from the oven and let cool slightly.
04 -
Reduce the oven temperature to 325°F (163°C). In a large mixing bowl, beat the cream cheese and sugar together until smooth and creamy. Add the melted chocolate chips, cocoa powder, and flour; mix until fully combined. Stir in the vanilla extract. Add the eggs, one at a time, mixing on low speed until just blended. Do not overmix.
05 -
Pour the cheesecake batter over the cooled brownie crust, spreading it evenly.
06 -
Place the springform pan on a baking sheet to catch any drips. Bake for 60-70 minutes, or until the center is set and the edges are slightly puffed. Turn off the oven and leave the cheesecake inside with the door slightly ajar for 1 hour.
07 -
Remove from the oven and let cool completely at room temperature. Refrigerate for at least 4 hours, or overnight, to allow the cheesecake to set.
08 -
In a heatproof bowl, place the chocolate chips. In a small saucepan, heat the heavy whipping cream over medium heat until it just begins to simmer. Pour the hot cream over the chocolate chips and let sit for 2-3 minutes. Stir until the mixture is smooth and glossy.
09 -
Allow the ganache to cool slightly, then pour over the chilled cheesecake, spreading it evenly. Refrigerate for 30 minutes to allow the ganache to set.
10 -
Carefully remove the sides of the springform pan. Slice the cheesecake with a sharp knife, wiping the blade clean between cuts for neat slices. Serve chilled.