"The Great British Bake Off: An Extra Slice" is a companion show to the popular baking competition, "The Great British Bake Off". It features behind-the-scenes footage, interviews with contestants, and discussions about the latest episodes. The show provides fans with additional insights and highlights from the main series. Hosted by comedian "Jo Brand", "An Extra Slice" invites celebrity guests and fans to share their thoughts on the bakes and challenges. Viewers can enjoy humorous commentary and see some of the best amateur baking creations submitted by fans, adding an interactive element to the baking experience.