which is not much money
to be on the fast track to being a foodie item (ie cupcake status)
it has to be affordable (as in anybody making minimum wage could buy it. anybody with any kind of a job can afford 8 euros).
it has to have an air of pretension (like you have to be able to say that xxx you have in your hand sux. go to this store. this xxx has too much insert answer here eg buttercream, sugar, what have you). banh mi, ramen, macarons, cupcake, burgers all fit here.
i think that's about it