I've seen a couple people say they were getting their little ones a cake for their "1/2 birthday"…

I've seen a couple people say they were getting their little ones a cake for their "1/2 birthday" and I was planning on doing the same but got to thinking, they can't even eat it so what's the point. Or can they? Is there a kind of "cake" you can make without all of the sugar, basically something safe for baby to ingest should he stick his fingers in his mouth when playing with it(which is guaranteed to happen)?