The Great British Bake Off Season 16 Episode 4: What happened during the Signature challenge?

The Great British Bake Off Season 16 Episode 4 aired on September 23, 2025. The latest episode of the baking competition featured remaining bakers going through the back-to-school week. This included Tom, Toby, Iain, Jasmine, Aaron, Nataliia, Lesley, Nadia, and Jessika.

For the Signature challenge, bakers were tasked with preparing identical flapjacks with an oat base. Additionally, they should also feature an extra topping or filling within two hours.

As the bakers began preparing their flapjacks, each had their preferred flavor in mind. While baking, they shared their backstories and more during the challenge. At the end, some of the bakers had to hurry as they didn't have enough time to complete their decorations.

The official synopsis for The Great British Bake Off episode 4 reads:

"We're going back to school, as the bakers make canteen flapjacks, school cake and a school fete Showstopper. Who'll be top of the class, and who'll be expelled from the tent?"

Read further to know more about the Signature challenge from the latest episode.

The Great British Bake Off Season 16 Episode 4: Highlights from the Signature challenge

For the latest episode's Signature challenge, show hosts Alison Hammond and Noel Fielding welcomed the remaining nine bakers. Judges Prue Leith and Paul Hollywood were also present in the tent.

Soon, The Great British Bake Off hosts announced the Signature challenge in their unique and quirky way.

"For your first school time bake, Miss Leith and Miss Hollywood would love you to make a batch of 12 identical flapjacks. Your flapjacks will need classic oaty base, but also an extra filling or topping. You've got two hours," announced co-host Noel Fielding.

Sharing more about the reason behind the Signature challenge, one of the judges, Prue Leith, confessed to the cameras:

"This is back-to-school week. It's all about reinventing bakes that you had at school. Only this time making them really, really good."

Fellow judge Paul Hollywood was looking forward to seeing how bakers would use the sugar and maintain the sweetness in the flapjacks.

While bakers began preparing their customized flavors of flapjacks, judges and hosts paid them brief visits. Each of the bakers had a unique flavor in mind, along with a particular shape and the way they wanted to present it.

Along with the flapjacks, bakers were also supposed to have their "delicate decorations" and "tantalizing toppings" on them. Later, when most of the bakers were taking their baked flapjacks out of the microwave, Lesley was preparing hers to put inside to bake.

While taking her flapjacks out of the mold, The Great British Bake Off's Nataliia accidentally broke it in half. Paul was standing right by her side when it happened. By the end of the challenge, everyone rushed to complete their decorations and icing.

For the Signature challenge, bakers prepared:

1. Tom's Apple Crumble Flapjacks,
2. Toby's Carrot Patch Flapjacks,
3. Iain's Banana Jacks Flapjacks,
4. Jasmine's Raspberry, Chocolate, and Hazelnut Flapjacks
5. Aaron's Lat Snacks Flapjacks,
6. Nataliia's First Day Flapjacks,
7. Lesley's Dan's Cherry Bakewell Flapjacks,
8. Nadia's Cherry and Coconut Flapjacks,
9. Jessika's Red Wine Rendevous Flapjacks,

Judges tasted individual bakers' flapjacks and shared their opinions about flavors, textures, sweetness, and other aspects.

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To know more, fans can stream The Great British Bake Off Season 16 Episode 4 on Netflix.

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