The new season of Kids Baking Championship kicks off with a whole new take on everybody's favorite: cookie cake! Duff Goldman and Valerie Bertinelli throw a curve ball at the 12 kid bakers by asking them to make layered, tiered, stacked and beautifully decorated cookie cakes.

It's no secret that Valerie Bertinelli loves lemon, and lemon goes with so many other flavors. This challenge Duff Goldman and Valerie have the kid bakers celebrate lemon and its "best flavor friends" in the form of lemon bars. The result will be sour for one baker as they are sent home.