Preheat oven to 350 degrees F.

Spray a 9-inch springform pan with baking spray and set aside.

Finely crush the cookies in a food processor, transfer to a medium bowl and add melted butter. Mix until combined, press crumb mixture onto the bottom of the prepared pan and bake for 5 minutes. Remove from the oven and set aside on a wire rack to cool while making the cheesecake filling.

Bring a medium saucepan half filled with water to a boil. Place chopped chocolate in a heat proof medium bowl set over the saucepan of simmering water, let it melt, stirring just a few times. Make sure the bowl doesn't touch the boiling water, to avoid overheating. Remove bowl from heat and set aside to cool.

In the bowl of a stand mixer fitted with the wire whisk, mix cream cheese and sugar until smooth, mix in cocoa powder and add the eggs one at a time, mixing on low speed and making sure not to overbeat. Pause a few times to scrape the sides of the bowl with a spatula.

Add melted chocolate and mix on low speed to combine.

Pour the cheesecake filling over the crust and smooth the top.

Bake until the center is set and the top looks dry (about 1 hour to 1 hour 10 minutes).

Remove from oven and cool in the pan on a wire rack and prepare the caramel sauce.

In a medium sauce pan over medium heat melt sugar while stirring constantly until a brownish liquid forms.

When sugar has completely melted, add the butter and stir until well combined.

Carefully while still stirring add the heavy cream, once all the cream has been added let the mixture boil without stirring for one minute.

Remove from heat, and pour caramel over the cheesecake. Using a spatula or spoon smooth it on top of the cheesecake.

Let the cheesecake cool down and for the caramel to settle for 30-40 minutes, then run a thin knife around the sides of the pan and set the cake in the refrigerator (uncovered), for at least 8 hours, or better overnight before serving.

When ready to serve pile up 20 large marshmallows in the middle of the cake and using a torch toast them carefully.

Add a few maraschino cherries and serve.