In a large mixing bowl, whip the heavy cream using a hand mixer until soft peaks form.
Gently fold in the mini marshmallows, chocolate fudge sauce, powdered sugar, vanilla extract, chocolate chips, and a pinch of salt until well combined.
Line a baking dish with parchment paper for easy removal.
Spread half of the graham cracker crumbs evenly across the bottom of the lined dish.
Pour the whipped mixture over the crumbs, spreading it evenly.
Sprinkle the remaining graham cracker crumbs on top of the chocolate cream mixture.
Cover the dish with plastic wrap and place in the freezer for at least 4 hours or until the mixture is firm.
Once frozen, remove from the dish by lifting the parchment paper.
Cut into squares or rectangles (about the size of a graham cracker) to make individual sandwiches.
Take two pieces of frozen mixture and sandwich them between two graham crackers.
Serve immediately or store in an airtight container in the freezer until ready to enjoy.
Notes
Serve on a decorative platter and top with extra chocolate sauce and mini marshmallows for a delightful finish.