"Icing falls under the 'gel' category," Burns continued. "Unlike a thin layer of icing that resides on the top of most cupcakes, this cupcake had a thick layer of icing inside a jar.
"In general, cakes and pies are allowed in carry-on luggage, however, the officer in this case used their discretion on whether or not to allow the newfangled modern take on a cupcake per 3-1-1 guidelines," he said. "They chose not to let it go."
The passenger who carried the cupcake, a Massachusetts resident named Rebecca Hains, told The Associated Press in December that she had flown through Boston's Logan Airport with two of the cupcake-in-a-jars.
TSA has been criticized for its airport security procedures, including patting down an 8-month-old baby and allegedly strip-searching elderly passengers, which the agency has denied.
The agency has recently released a series of reports of weapons it discovered that were concealed as such common items as a credit card, a belt buckle and a cellphone.