Sweet Tooth Special

An episode celebrating all things sweet, looking back at some favourite sugar-centred investigations. Matt Tebbutt hits the patisseries of Paris to find out why macarons are so expensive and explores the reasons for the surge in salted caramel Jimmy Doherty heads to America to find out how the chunks in ice-cream stay solid, asks why chocolate sometimes goes a funny white colour, and learns the secrets behind fizzy sweets. Kate Quilton reveals why some honey is runny, while other varieties are not.