Follow these simple steps to create your amazing Brownie Cheesecake:

1. Preheat your oven: Set it to 325°F (163°C) and grease a 9-inch springform pan.
2. Prepare the brownie layer:
– Melt the butter in a medium saucepan over low heat.
– Stir in the sugar, eggs, and vanilla until smooth.
– In a separate bowl, mix the flour, cocoa powder, salt, and baking powder.
– Gradually combine wet and dry ingredients until just combined.
3. Spread the brownie batter: Pour the brownie mixture into the prepared springform pan, spreading it evenly across the bottom.
4. Bake: Place in the oven and bake for about 20-25 minutes or until a toothpick inserted comes out with a few moist crumbs.
5. Prepare the cheesecake layer:
– In a large bowl, beat the softened cream cheese until smooth.
– Add the sugar, eggs, and vanilla, mixing until well combined.
– Stir in the sour cream until smooth and creamy.
6. Add cheesecake mixture: Pour the cheesecake filling over the brownie layer in the pan.
7. Bake again: Return to the oven and bake for an additional 30-35 minutes, or until the cheesecake layer is set and the center is slightly jiggly.
8. Cool the cheesecake: Remove from the oven and let it cool to room temperature. Then refrigerate for at least 2 hours to firm up.
9. Optional toppings: Before serving, consider adding chocolate ganache, whipped cream, or fresh berries on top for added indulgence and decoration.

These straightforward steps will guide you to a delightful Brownie Cheesecake that will impress anyone fortunate enough to try it!