Noodle...

Mr. Ping: The secret ingredient is... nothing!
Po: Huh?
Mr. Ping: You heard me. Nothing! There is no secret ingredient.
Po: Wait, wait... it's just plain old noodle soup? You don't add some kind of special sauce or something?
Mr. Ping: Don't have to. To make something special you just have to believe it's special.
Po: There is no secret ingredient...