FOOD UNWRAPPED GETS BAKING

8PM, CH4

For a special programme that answers burning questions on baking, Andi Oliver visits a cookie factory to investigate chocolate chips, Briony May Williams answers a pretzel mystery in Germany, and also uncovers the surprising origins of bicarbonate of soda. And who knew baking could be so explosive? Jimmy Doherty learns more when he is, quite literally, blown away by flour.