01 -
Preheat your oven to 350°F (175°C). Thoroughly grease a 9-inch springform pan, making sure to coat the bottom and sides.
02 -
In a mixing bowl, prepare the brownie mix according to the package directions, using the eggs, oil, and water as specified on the box. Spread the brownie batter evenly on the bottom of your greased springform pan. Bake for 30 minutes, until the brownie layer is just set but not completely done (it will finish baking with the cheesecake layer).
03 -
While the brownie layer is baking, make the cheesecake filling. In a large bowl, add the softened cream cheese, eggs, sugar, and vanilla extract. Using a hand mixer, beat the ingredients together until smooth and creamy, with no lumps remaining.
04 -
Once the brownie layer has baked for 30 minutes, remove it from the oven. Reduce the oven temperature to 325°F (165°C). Pour the cheesecake mixture over the hot brownie layer, spreading it evenly to the edges of the pan. Return the pan to the oven and bake for 50 minutes, or until the cheesecake is set around the edges but still slightly jiggly in the center.
05 -
Once baked, remove the cheesecake from the oven and let it cool completely on a wire rack at room temperature. Once cooled, refrigerate for at least 4 hours or overnight to allow it to set fully. When ready to serve, carefully run a knife around the edge of the pan before releasing the springform clasp. Serve slices with a drizzle of chocolate sauce if desired.