At heart, it's a biscuit, and did you know that 'biscuit' means 'cooked twice'? From the original Latin bis (twice) and coctus (cooked). Wow.
But unlike that reversible jacket that you only ever wear one way, because let's face it, the inside is only ever a slightly-nicer-than-normal lining fabric, most people do drink from their cup and eat it too. That's probably because for us, it wasn't just important that it was edible, it had to be delicious too.
I'll let you know when I think of more two references. In the meantime, PEACE *holds up two fingers*.
- Simone