"You're being asked to make twelve individual chocolate covered cookie bars."

"Your cookie bars must be uniform and contain at least one baked cookie element. They must also contain an additional element, which could be a second layer of caramel, nougat or any other delightful filling that you can think of."

"They must be fully coated in chocolate and topped with a decorative element as well. You will have two and a half hours."

Paul Hollywood: "The perfect cookie chocolate bar for me is about finding the hero flavour. It could be anything. But whatever they choose, it must come through. You don't want flavors fighting with each other."

Prue Leith: "It's cookie week. They have to be careful about not overhandling their dough. It needs to be very precise so that they must cut it perfectly."