John Henson pairs up the bakers into research teams; they create lab specimen-stuffed desserts, featuring tongues, eyeballs, noses and toes.

Inspired by the lab's umami-loving mummy, John Henson tasks the bakers with creating sweet mummy treats featuring umami ingredients.

Ten bakers explore the spooky Henson Laboratories, where mad scientist John Henson tries to appease the lab's haunting specters with sweet treats. At the end of the experiment, one baker will win the Halloween Baking Champion title and a $25,000 prize!?

John Henson catches a spirit in the X-ray room and he wants the bakers to use its X-rays as templates for build-a-spirit desserts.