S7, E9: The remaining 12 contestants are broken up into two teams to prep, cook and plate 30 dishes for teenagers celebrating their Sweet 16 birthdays. Each team receives a surprise box with 16 different ingredients and one protein. They’ll have 60 minutes to prepare and present their dishes to the diners, who then will vote on their favorite dish. To kick off the challenge, judge Christina Tosi exhibits her signature three-layer cake for the contestants. Find out who bakes their way through the pressure and who melts down.