I totally thought it was a carnation when I saw that photo and only realized it was cake once that was pointed out.
I would absolutely not put it past him to eat a carnation, though (just looked it up and Dianthus species, like carnations [Dianthus caryophyllus], are edible). He seems like the kind of person who would eat something weird on a dare. I would love to test that theory.
Here's some real carnations. Not cake cosplaying as a carnation.