Mel Giedroyc and Sue Perkins are with them every step of the way ready to lend a hand or a shoulder to cry on as the bakers try their luck with Victorian classics, high end patisserie, chocolate sculptures and every day staples.
It's Cake week tonight, and their first signature challenge is to make Madeira cake. It's a well-loved cake, but will they try to reinvent it or stick to the classic recipe?
Their first technical is Mary's frosted walnut cake, and then their first showstopper is a Black Forest gateau. It's retro with chocolate, cherries and cream but who can reinvent it to be crowned week one's star baker?
The Great British Bake Off, BBC1, 8pm
Try Reveal's digital edition on iPhone & iPad. Subscribe now & never miss an issue!