Preheat the oven to 350 degrees F. Spray a cake pan with nonstick spray and set aside.
Remove the biscuits from the packages.
Using a rolling pin, roll each of the biscuits very flat and thin. Stir together the white sugar and cinnamon in a small bowl.
Dip each biscuit in the melted butter, shake off the excess and then dip the biscuit in the cinnamon sugar mixture making sure to cover both sides. Shake off the excess.
Slice the marshmallows in half.
Using the picture in the post as a guide, place a small handful of graham cracker crumbs, miniature marshmallows, and miniature chocolate chips on one side of each biscuit.
Roll up each biscuit and place the rolled up biscuit on the outside of the cake pan in a circle fashion spiraling towards the inside of the pan.
Bake for 18-20 minutes.
Meanwhile, prepare the frosting by beating together the powdered sugar, butter, and vanilla extract. Beat in the marshmallow fluff.
Slowly add in the heavy cream until desired consistency is reached.
Remove the cake and let cool for about 5-7 minutes before frosting.
Pipe the marshmallow frosting over the cake and cut into slices to serve.
Top the cake with any leftover miniature marshmallows, miniature chocolate chips, and graham cracker crumbs that weren't used to fill up the biscuits.
If desired, unwrap a room temperature chocolate bar, and “peel” it from top to bottom directly over the cake.