John mistakes macaroni for marshmallow
Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.
John genuinely seems to enjoy the white chocolate and macaroni cheese flavour, and correctly identifies that it contains white chocolate, but thinks that the "bits" in it are "marshmallow". He incorrectly guesses that the cornflakes and chilli flavour contains "wasabi", and guesses that the curry and naan bread flavour is "tikka massala", which is counted as correct. He also identifies the Marmite in the Marmite and porridge flavour. Overall, he comes joint second, having correctly identified three flavours.
(Written by Karl Craven)