The cooks keep it in the family, making recipes passed down through the generations. The guest chef Ruth Rogers sets the immunity challenge.

The show goes to chocolate heaven, as the cooks are challenged to produce sensational sweet and savoury spoonfuls containing chocolate, ranging from chocolate cupcakes to chocolate and Stilton tarts.

Simon Rogan, the chef behind L'enclume, one of Britain's best restaurants, shows the cooks how one man's trash is another man's treasure, as he challenges them to cook fantastic food using leftovers.