Jimmy investigates the science behind our favourite snack foods. Can you describe the flavour of fizzy cola? Experts say cola's flavour includes lavender and coriander as well as orange, lime and lemon. After a supermarket taste test, Jimmy attempts to mix his own cola syrup and inject some fizz. He also tries to work out how to make potato into hoops, twirls and other shaped snacks.Jimmy's snack food production line consists of drainpipe, a hand-mincer and a water cooler bottle. How will they help him reveal the secrets behind our favourite snack foods?Jimmy visits the biggest ice cream factory in the world in his quest to discover the secret ingredient that makes ice cream the only food we can eat straight from the freezer. He also visits one of the world's biggest crisp factories to discover why the perfect crunch makes eating crisps so enjoyable.