Sure there are all sorts of edible flowers but have you actually eaten them? I have, they taste like, well, like flowers. Wouldn't you rather eat something that looked like a flower but tasted sweet? Of course you would.
I bet a teacher would appreciate a cupcake that looks like an apple even more than an actual apple. Yes, they are the pillars of society, but everyone needs an unhealthy treat now and again. Plus, maybe it's some sort of apple spice cake, that's not so unhealthy right? I'd even eat that!
Edible star glitter! I will always be blown away by the variety of food decorations that look inedible but are in fact safe! Also, the little fondant mug on top of this cupcake is filled with butterbeer so you get a little sip before you eat the creamy goodness below. Genius.