Pulse the Golden Grahams cereal in a food processor until finely crushed. Pour into a shallow dish.

Warm the hot fudge sauce in the microwave, then spread it in a second shallow dish.

Dip the rim of a martini glass into the hot fudge, then into the crushed cereal. Chill the glass in the refrigerator.

Fill a cocktail shaker with ice. Add white chocolate liqueur, creme de cocoa, and whipped cream vodka. Swirl to combine.

Strain the drink into the prepared glass and return it to the fridge.

Wet a wooden skewer and add the marshmallow. Carefully roast it over a flame until lightly blistered.

Lay the skewer across the glass and serve.