Host Carla Hall challenges the five remaining bakers to reinvent the Boston cream pie using that great Massachusetts ingredient, coffee syrup. In the bake-off, the competitors learn that Maine was the first state ever to make whoopie pies, and they're tasked with creating beautiful plated desserts based on this favorite treat. Carla and the judges, Gesine Prado and Jason Smith, decide which baker's time in the competition has come to an end.

The pressure peaks in the Best Baker in America finale as host Carla Hall challenges the bakers to turn California's famous chiffon cake into the hottest cake sensation -- a tsunami cake -- featuring lemons and avocados, ingredients commonly associated with the Golden State. In the final bake-off, the competitors are baking to win as they each build a 2-foot-tall Hawaiian-themed dessert showpiece featuring lilikoi (passionfruit), haupia (coconut custard), malasada (Hawaiian doughnuts) and intricate chocolate work. Finally, Carla and judges Gesine Prado and Jason Smith decide which baker has earned the title of Best Baker in America!