It is day nine and the second week of Junior Bake-off 2013. Today Zainab, Louis, Ruby and Charlie are the four new young bakers who made their way to the bake-off tent.

Mary Berry and James Martin will keep a watchful eye on the young bakers and will set them two tasks to test their baking skills.

The technical challenge for the bakes today is one of James Martin’s recipes: butterfly cakes. The judges ask the bakers to make 12 of them filled with cream and swirled with a delicious lemon curd.

This is the first time that Zainab 10, from Hertfordshire, Louis 10, from Cambridge, Ruby 12, from Cheshire and Charlie 11, Norfolk will have baked one of James’s recipes.

The showstopper challenge is one that tests the creativity of the four bakers. Today the young bakers had to bake a natural wonders of the world theme cake.

The bakers were allowed to choose the size and texture of their cake, but it had to be well made, evenly baked with fantastic combination of flavours and a great design.

For his showstopper challenge, Charlie made his chilli chocolate mountain cake with peppermint icing. Zainab made her coral ocean marble cake with buttercream icing. Ruby made her floating iceberg cake with chopped pistachios and Louis made his pamukkale cake with a passion fruit curd.

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The young bakers gave it all their best efforts but in the end there could be only one baker that would go onto compete again in the semi-finals and that young baker chosen by Mary and James was Zainab.