Matt Tebbutt reveals the secret behind the iced writing that is so perfect on every supermarket birthday cake, while Kate Quilton looks at the growing trend of hemp-based food products. Jimmy Doherty heads to Japan to establish why soy is in so many of the public's favourite foods and learns how this little bean could be health enhancing.

Kate and Helen explore vanilla, while in the Netherlands Matt explores the myth that Edam balls were once used as emergency cannon balls!