Preheat and Prepare

1. Preheat your oven to 325°F (160°C).
2. Grease a 9-inch springform pan and line the bottom with parchment paper for easy removal.

2. Make the Crust

1. Combine Oreo crumbs, granulated sugar, and melted butter in a medium bowl until well mixed.
2. Press the mixture evenly into the bottom of the springform pan, using the back of a spoon or a flat-bottomed glass to compact the crust.
3. Bake the crust for 8-10 minutes, then set aside to cool.

3. Prepare the Cheesecake Filling

1. Melt the bittersweet chocolate chips using a double boiler or microwave in 30-second intervals, stirring until smooth. Set aside to cool slightly.
2. In a large mixing bowl, beat the cream cheese until smooth and creamy. Scrape down the sides of the bowl as needed.
3. Add the granulated sugar, brown sugar, and cocoa powder, mixing until fully combined.
4. Beat in the eggs one at a time, ensuring each is fully incorporated before adding the next.
5. Mix in the heavy cream and vanilla extract until smooth.
6. Gradually fold in the melted chocolate until the batter is uniform.

4. Bake the Cheesecake

1. Pour the cheesecake batter over the prepared crust, spreading it evenly.
2. Place the springform pan inside a larger roasting pan and add hot water to the roasting pan, filling it halfway up the sides of the springform pan to create a water bath.
3. Bake for 75-80 minutes, or until the edges are set and the center jiggles slightly when gently shaken.
4. Turn off the oven and leave the cheesecake inside with the door slightly ajar for 30 minutes.
5. Remove from the water bath and let cool completely on a wire rack before refrigerating for at least 6 hours or overnight.

5. Make the Ganache Topping

1. Heat the heavy cream and melted butter in a microwave-safe bowl until warm, about 60-90 seconds.
2. Add the chopped semi-sweet chocolate and let it sit for 1 minute before stirring until smooth.
3. Allow the ganache to cool slightly before pouring over the chilled cheesecake. Spread evenly with a spatula.
4. Refrigerate for 1 hour to set the ganache.

6. Garnish and Serve

1. Slice the cheesecake using a sharp knife, cleaning the blade between cuts for neat slices.
2. Garnish each slice with Reddi-Wip, a drizzle of chocolate syrup, or grated chocolate for an elegant presentation.