From edible ugly sweaters to boozy cupcakes: Guest judge Liza Koshy

Baking teams give the gift of good taste with delicious treats inspired by Christmas trees. Guest judge: Flour Shop owner Amirah Kassem.

A carolling theme throws the contestants a curveball. But will their bakes hit a high note — or fall flat? Guest judge: cookbook author Donal Skehan.

The bakers enter the Land of Sweets to construct "Nutcracker"-inspired whimsy. Guest judge: dancer and actress Jeanine Mason ("Roswell, New Mexico").

Christmas comes to the kitchen in three rounds of Santa-themed baking. Guest judge: actress Tiffani Thiessen ("Saved by the Bell," "Alexa & Katie").

The competition heats up with a wintry theme that sparks festive sweets and icy-cold flavors. Guest judge: Olympic ice dancer Meryl Davis.