Costco's latest Halloween novelty, a 5½-pound chocolate Frankenstein head stuffed with gummy candy and sold with its own smashing mallet, has already sold out on the retailer's website after going viral on social media.
The product, called the Monster Mash Chocolate, is made by Ten Acre Gifts and retails for $54.99 in Costco warehouses. Buyers crack open the hollow chocolate skull with an included mallet to reach gummy candies shaped like body parts hidden inside. Fox Business reported that the item appeared to be sold out on Costco's website by Saturday evening, though it was unclear whether in-store stock remained.
The sell-out has not stopped demand. Listings on eBay showed the chocolate head going for as much as $100, nearly double the retail price. Online purchases through Ten Acre Gifts or other retailers ran above $60, still a markup over the Costco in-store tag.
The product's nutritional label lists 150 calories per serving with 25 servings per container, a detail that puts the full head squarely in the category of a party centerpiece rather than a solo snack. Costco, a company that has built its reputation on oversized value, appears to have found the sweet spot between novelty gift and seasonal spectacle.
The warehouse giant has a long track record of turning seasonal items into viral moments, and the Frankenstein head fits the pattern. Costco's ability to move unusual products at scale is part of what keeps its membership model working, shoppers come for the surprise finds and stay for the bulk savings. The retailer has been expanding aggressively, with plans for new U.S. warehouses that will put these kinds of items in front of even more customers.
Fox Business said it reached out to Costco for comment but did not report receiving a response.
Reactions online ranged from genuine excitement to amused horror. One user on X wrote:
"Costco looked at Halloween and said, 'What if a piñata... but medically concerning?'"
Another declared the chocolate head "a priority need in my life." Not everyone was sold. An Instagram commenter called it a "hard pass" but allowed it "would make a great prank Christmas gift." One person on Instagram said they would consider buying it if they were hosting a Halloween party.
The mallet itself drew its own commentary. One X user marveled at the concept: "Imagine explaining to someone that your Halloween candy comes with its own demolition tool." Another joked that Costco's attitude toward safety was casual at best, writing, "A hammer for Halloween candy is insane."
Costco has never been shy about leaning into the unconventional. The same warehouse floors that stock rotisserie chickens and industrial-size detergent also feature items that create their own secondary market when they sell out or get returned. The Frankenstein head, now fetching resale premiums on eBay, is the latest example.
Shares of Costco Wholesale Corp. (COST) closed at $904.77, up $2.39 or 0.26 percent. The stock movement had no stated connection to the viral product, but the company's ability to create buzz with seasonal novelties is part of a broader retail strategy that keeps foot traffic high and membership renewals steady.
That foot traffic sometimes brings its own complications. Costco's warehouse model, built on trust and open floor plans, has faced questions about shopper accountability even as the company continues to roll out new perks and services for its members.
Whether the Monster Mash Chocolate gets restocked before October 31 remains unclear. Costco has not said publicly how many units it ordered or whether a second run is planned. For now, shoppers who missed the $54.99 window face a choice: pay double on eBay or hope their local warehouse still has one sitting on a pallet.
Members looking for other under-the-radar Costco offerings might want to explore what else the retailer has been quietly rolling out, from lesser-known delivery services to evolving online storefronts.
A 5½-pound chocolate monster skull that comes with its own hammer, only at Costco would that sell out before most families have even picked their pumpkins.