The 1-foot tall, 2-foot wide cupcake on display Saturday at the Minneapolis Mall of America had 15 pounds of fudge filling and 60 pounds of yellow icing.
Guinness World Records adjudicator Danny Girton Jr. called it a "fun and creative achievement."
The cupcake was made by cakes.com, which is run by cake-decoration supplier and marketer DecoPac.
Company spokeswoman Jamie Miller said the giant cupcake will go to a pig farm. The company decided against giving away pieces to mall patrons because most would not have had frosting.
Instead, cakes.com gave away 4,000 smaller cupcakes.
