Are Bundt Cakes allowed on Airplanes?

Marash Girl had baked a bundt cake for her grandson's 9th birthday.  As she took it out of the cake pan to wrap it in tin foil and place it in her carry on, Marash Boy, horrified, exclaimed, "You can't take that cake on the plane!  It looks like a bomb!"  Although Marash Girl had never seen a bomb (only a hand grenade which her cousin Eddie proudly exhibited when he immigrated to the United States soon after fighting in the French Army), she agreed that she would not put the powers that be to the test . . . So her poor grandson had to eat store bought birthday cake, but then at least Marash Girl and her bundt cake were not detained at the airport!