In the cookie face challenge, Valerie Bertinelli and Duff Goldman challenge each of the five bakers to create a giant cookie face with 3-D features that communicate an assigned expression like happy, sad, angry, surprised or excited.

For the finale, Valerie Bertinelli and Duff Goldman focus on biomes -- large regions of Earth with specific climates that are home to certain types of living things. The three final bakers must make cakes based on a specific biome: rainforest, desert or coral reef. The young baker with the best biome cake earns $25,000 and the title of Kids Baking Champion!