This Halloween Sheet Cake is a festive and delicious chocolate dessert perfect for spooky celebrations. Made from a simple chocolate fudge cake mix with a rich chocolate frosting, it’s topped with crushed chocolate sandwich cookies, chocolate-decorated Milano cookies shaped as tombstones, gummy worms, candy pumpkins, and sprinkles for that fun Halloween vibe. Quick to prepare and sure to impress trick-or-treaters and party guests alike.