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.

It's the semi-finals, and the remaining teams must draw inspiration from the office of headmaster Albus Dumbledore's office, which houses many iconic items from Harry Potter lore. And since the office is also home to Fawkes the Phoenix, hosts James and Oliver Phelps request that part of each team's 4-foot-tall showpiece should appear to be transforming from one thing to another. Plus, the tasting elements must highlight two of the four pillars of flavor: sweet, sour, spicy and salty. Harry Potter alumna Bonnie Wright joins judges Carla Hall and Jozef Youssef to decide which teams will go on to the final showdown.