desserts? >> welcome. >> at london's posh barclay hotel, pret a porte, french for ready to wear fashion, is pret a porte with designers helping to create edible fashion for high tea. >> they usually come up with a design. i get pushed and challenged. you know? if sometimes i'm happy with something but they're not. >> ultimately chef mourad always finds perfection and alexander mcqueen hat anyone? this is oscar de la renta. >> coconut and lime mousse and we actually spray this green color here. >> a takeoff of this dress worn by rihanna. >> filling it with a raspberry mousse inside and we'll finish it off with the spun sugar. >> one piece can take hours to make. but no one said ho couture was easy. >> the hardest one. >> wow, look at those. >> a cheesecake molded after an emiliol pucci trench coat.