Overview: The first quartet of junior bakers enter the tent for two exciting baking challenges - and aiming for the first of 10 quarter-final places. Annabel, Harry, Tyrese and Abi have their baking knowledge and piping skills put to the test when they are asked to follow Allegra's surprise recipe for a US classic - red velvet whoopee pies. These stunning cookie sandwiches which ooze fluffy meringue filling prove themselves to be a tricky first technical challenge for the bakers. This is followed up with gravity-defying show-stoppers that require the bakers to demonstrate engineering, as well as baking skills. Expect spectacular bakes which take off into the sky and others which topple and fall.