Mystery Biscuits comes from Citation Needed, where a light-hearted discussion about biscuits became a shareable short audio moment. Fans clipped the exchange because its guessing-game structure travels well outside the original episode, working even for viewers who have never seen the show. It spread through soundboards and short-form edits, where creators reuse it to frame reveals, snack jokes and playful arguments about hidden contents. Its appeal is simple: the premise is instantly understood, the tone stays friendly, and the joke does not depend on knowing a long backstory.