Make the filling. Add the cream cheese, mascarpone, mashed sweet potato, sweetened condensed milk, maple syrup, vanilla, cinnamon, nutmeg, and salt the the bowl of your stand mixer. Beat on medium speed for a couple minutes or until combined and smooth. Cover and chill in the fridge while you prepare the crust and toppings.

Place the graham crackers in a food processor and process until they are a very fine crumb. Add the melted butter and stir until moistened.

Preheat your oven's broiler to high. Position the top rack in the upper third of the oven. Line a baking sheet with foil and add the marshmallows. Place under the broiler for about 30 seconds, or until golden, watching super carefully because they can burn in an instant!

To assemble the cheesecakes, place a few spoonfuls of crust in the bottom of small jars or cups, pressing down with your fingers or a spoon. Pipe or spoon the cheesecake filling into the jars, then top with a sprinkle of dark chocolate, then the marshmallows and another sprinkle of dark chocolate. Finish with a pinch or two of cinnamon and nutmeg. Refrigerate for 2 hours before serving.