Brownies

1. Preheat the oven to 325 F. Line an 8×8 baking dish with foil, then butter the foil.
2. Combine flour, salt, and baking powder in a small bowl. Set aside. Melt butter and chocolate together in a saucepan over medium heat, stirring frequently to avoid burning the bottom. When the mixture is fully melted and incorporated, remove from heat and stir in vanilla and sugar. Add eggs, one at a time, and mix to fully incorporate. Add flour mixture and stir until just combined. Pour into the prepared pan and smooth top. Pour the cream cheese layer over the brownie layer, then drizzle the caramel as you wish.
3. Bake for 40-45 minutes, or until a cake tester comes out mostly clean – these brownies are not cakey at all, so they will still be somewhat dense and gooey. Remove pull the brownies out with the foil, and cool completely. For an easier time cutting them up, stick them in the fridge (or even freezer!) to really solidify them.
4. When they're fully chilled, cut them into cubes no larger than 1" across. I opted for 1/2" cubes.

Crust

1. Preheat the oven to 375 F. Butter a 9x3 round spring form pan.
2. In a food processor, pulse the graham crackers, sugar, and salt, until finely ground. Add melted butter and pulse until combined. Press into the bottom of the buttered pan, and up the sides one inch. Bake for 12-14 minutes, then let cool while you're making the cheesecake filling.

Cheesecake

1. In a large mixing bowl, cream the cream cheese and sour cream until smooth. Add sugar, then eggs, one at a time. Mix in vanilla.
2. Arrange the brownie cubes in the prepared crust so that they have between 1/4 and 1/2 inch between each piece. Pour the cheesecake batter over the brownies in the crust and smooth the top. Bake at 325 F for an hour and twenty minutes, or until the cake is mostly set and still jiggly in the middle. Remove from the oven and allow to cool completely.

Ganache

1. Prepare the ganache when the cheesecake is completely cooled.
2. Grate chocolate in a food processor until very fine.
3. In a small pan, combine the sugar and water. Stir, over medium heat, until the sugar has completely dissolved. STOP STIRRING and allow the mixture to bubble until it is a deep amber color, or your candy thermometer is close to 370 F. Remove from the heat and, while stirring, add the cream. This will bubble furiously - KEEP STIRRING! Return to low heat and stir until the mixture is 100% smooth. Stir in the butter.
4. Pour the caramel mixture into a vessel with a pouring spout. With the food processor running (with the chocolate in it), gradually pour the caramel mixture in. By the time you're done pouring, it should all be smooth and chocolatey!
5. If your cheesecake has a very uneven surface, trim it with a warm knife to flatten the top before pouring the prepared ganache over the top. Allow the ganache to cool several hours on the cheesecake before serving.