Begin by placing the graham crackers into a large zip top bag and crush them with a rolling pin until they are in fine pieces. Pour the crushed graham crackers onto a small plate or bowl.

Pour the hot fudge topping into a second small bowl or plate. Take your cups for the milkshakes and dip the rims into the fudge topping, and then roll them in the graham cracker crumbs. Place the cups in the freezer until you are ready to serve

In a blender, combine the marshmallow fluff, milk, and chocolate syrup. Blend the mixture untul the marshmallow fluff has been separated into smaller pieces.

Once the marshmallow fluff is no longer one big chunk, add the ice cream and blend until all ingredients are combined. If your milkshake is too thick, add additional milk in small amounts. If it is too thin, add additional ice cream.

Pour the milkshakes into the cups that have been stored in the freezer, then serve!