Hosts James and Oliver Phelps welcome nine pairs of gifted professional pastry chefs and cake artists to Warner Bros. Leavesden Studios, home to the iconic sets of the Harry Potter films. For their first challenge, the bakers must create an edible showpiece that is at least 2 feet tall, includes at least one magical effect, and tells the story of their shared love of Harry Potter. Plus, each team member must make a tasting element that showcases their individual specialty. Expert culinary judges Carla Hall and Jozef Youssef decide which bakers will earn a ticket to board the Hogwarts Express train to the next challenge!

In a salute to the famed Diagon Alley, hosts James and Oliver Phelps ask each team to create fifty identical handheld desserts, inspired by one of the many different shops, and feed them to a crowd of eager Harry Potter fans on the actual set. The bakers must present their desserts in a way that highlights an interactive, magical effect. The Potter fans will vote for a winner, while judges Carla Hall and Jozef Youssef decide which team must leave the competition.