Infestation!

A swarm of creepy crawlies is on the menu as Duff Goldman challenges the bakers to create cakes that have become infested and decayed. Sauerkraut and pickled watermelon rind are among the fermented ingredients at their disposal. After one competitor bugs out, the remaining three bakers head home to build their masterpieces made to rot before the judges' eyes. The final cakes are screamworthy with shocking transformations and delectable flavor combinations. (Listed as S01E04)