Preheat the oven to 325 and grease a 9 inch spring form. You will need a large roasting pan (one that’s bigger and longer than the spring form. I use the aluminum foil disposable ones.)
In a small bowl, combine graham cracker crumbs, melted butter, vanilla extract and brown sugar. Mix very well.
Spread crumb mixture in the bottom on the spring form, evenly, pressing it over the bottom and half way up the sides.
Spread mini chocolate morsels and marshmallows over the bottom, evenly.
In a bowl of an electric mixer, beat cream cheese on medium-high speed until smooth and fluffy. Scrape sides and bottom on the bowl and beat for another minute.
Add corn starch and sugar and mix until combined.
Beat in eggs until well incorporated.
Add sour cream, vanilla extract, and heavy cream and beat until all mixed very well.
Transfer batter into the spring form and spread in evenly. (If you are not sure about your springform holding up in water, you can wrap the springform in heavy duty aluminum foil from bottom up to the sides.)
Place roasting pan into the oven and place cheesecake spring form inside the roasting pan. Carefully add water to the roasting pan, about half way up the side of the spring form.
Bake for 90-95 minutes. Turn off the oven and open the oven door half way. Let cheesecake rest for 10 minutes and take it out of the oven.
Let it rest for 10 minutes on the counter and then gently run a butter knife between sides of the cheesecakes and the springform to carefully separate it. (You don't actually have to take the cheesecake out of the pan until ready to serve.)
Cool cheesecake for an hour.
Turn on the broiler in the oven.
Spread warm hot fudge over the top of the cheesecake and spread marshmallows evenly on top.
Place cheesecake back in the center of the oven, under the broiler. Let marshmallow toast for only 30-35 seconds. Watch it because they toast very quickly. Take out the cheesecake once marshmallows are lightly browned.
Cool cheesecake completely, cover gently and refrigerate for at least 4 hours.
Recipe from Lyuba @ willcookforsmiles.com All images and content are copyright protected. Please do not use my images without prior permission. If you want to share this recipe, please simply link back to this post for the recipe. Thank you.