The bakers face decay when host John Henson challenges them to make moldy desserts that incorporate fermented ingredients. Then, judges Carla Hall, Zac Young and Stephanie Boswell smash desserts and dreams as they send one baker packing up to the 13th floor.

John Henson turns the bakers' worlds upside down when he challenges them to make upside-down cakes without pineapple. Then, judges Carla Hall, Zac Young and Stephanie Boswell are seeing double when the six remaining bakers team up to create twin cakes that look identical but taste completely different. One set of twins is separated as the least successful baker is sent to the 13th floor.