Spread half of the hot fudge topping over top of brownies. Top with broken graham crackers and miniature marshmallows. Set oven control to broil. Broil with marshmallows 4 to 6 inches from heat 2 to 3 minutes or until marshmallows are lightly browned. Drizzle with remaining hot fudge topping. When ready to serve, cut into 4 rows by 4 rows.