For the hot chocolate:
- In a small saucepan, add the chocolate, milk, light brown sugar, cocoa powder, and a pinch of salt.
- Stir constantly until the chocolate has melted and all the ingredients are combined.
- Keep warm until ready to serve.
For the marshmallow meringue:
- In a large bowl, beat the egg whites with the cream of tartar on high until soft peaks form (tips will curl).
- Combine 1/2 cup light brown sugar, the light corn syrup, 1/4 cup water, and a pinch of cinnamon in a small saucepan. Bring to a boil, stirring to dissolve sugar. Cook for 2-3 minutes, then slowly add to the mixer on medium-low speed, combining with the egg whites.
- Increase speed to medium-high and beat until glossy and stiff (about 4 minutes).
- Scoop the meringue into a plastic pastry bag. Cut the tip of the bag so that a large layer of meringue will come out when squeezed.
- Squeeze a thick layer of meringue around the rim of a paper coffee cup.
- Using a kitchen blow torch, toast the marshmallow evenly until the meringue is light brown (it will look like a toasted marshmallow).
For the stabilized whipped cream:
- Refrigerate the whisk attachment and mixing bowl for at least 15 minutes.
- In a glass measuring cup, add the unflavored gelatin and cold water. Let it sit for about 5 minutes.
- Place the measuring cup with the gelatin mixture in the microwave for about 7 to 10 seconds until it becomes liquid again, but not hot. Set aside.
- Add the cream to the cold mixing bowl. On high speed, beat the cream until it begins to thicken up and then add the confectioners’ sugar.
- With the mixer running, drizzle in the liquid gelatin and continue to beat until soft peaks form.
- Serve immediately or put it in an airtight container and place it in the refrigerator. You can store this for 1 to 2 days without it losing texture or becoming watery.
Assembling the hot chocolate:
- Pour the hot chocolate into the paper cup with the toasted marshmallow around the rim.
- Using a medium ice cream scoop, place a big dollop of cream on top of the hot chocolate. You may need two scoops to sit above the marshmallow.
- Serve immediately with a spoon and enjoy this fun, decadent cup of hot chocolate!