Ingredients
Equipment
Method
Make the crust
- Heat the oven to 350°F.
- Coat the bottom and sides of a 9-inch springform pan with nonstick cooking spray.
- Mix the graham cracker crumbs and fine salt with the melted butter.
- Press the mixture firmly over the pan bottom.
- Bake for 8 to 10 minutes.
Make the filling
- Lower the oven to 325°F and let the crust cool while you prepare the filling.
- Wrap the pan in two layers of heavy-duty foil.
- Set the wrapped pan in a 12x16-inch roasting pan.
- Whisk the sweetened hot cocoa mix and unsweetened cocoa powder together in a small bowl.
- Beat the softened cream cheese and granulated sugar in a large bowl until smooth.
- Beat in the cocoa mixture.
- Melt the chopped semisweet chocolate in the microwave in 20-second bursts, stirring after each, until smooth.
- Cool the chocolate until barely warm.
- Beat the chocolate into the cream cheese mixture with the sour cream and vanilla extract until just smooth.
- Beat in the eggs one at a time on low speed, stopping as soon as each is blended.
Bake and chill
- Pour the filling over the crust.
- Set the roasting pan on the oven rack.
- Pour hot water into the roasting pan until it reaches 1 inch up the springform pan.
- Bake at 325°F for 75 to 90 minutes, until the edges are set and the center reaches 160°F on an instant-read thermometer.
- Turn off the oven, crack the door open, and leave the cheesecake inside for 1 hour.
- Lift the springform pan out of the water bath and remove the foil.
- Cool on a rack until room temperature, about 1 hour.
- Cover and chill for at least 6 hours or overnight.
Finish the topping
- Run a thin knife around the cheesecake and remove the springform ring, keeping the cheesecake on the pan base.
- Set the cheesecake on a rimmed baking sheet.
- Scatter the mini marshmallows evenly over the cheesecake.
- Set the broiler to high.
- Broil the cheesecake about 6 inches from the element for 30 to 90 seconds, watching constantly, until the marshmallows are golden.
Notes
For a smooth texture, stop beating as soon as each egg is blended. Cover and refrigerate leftovers for up to 4 days; the cheesecake can be frozen. For a gluten-free swap, use gluten-free graham cracker crumbs.
