It's a delicious new mystery with the Boxcar Children as they help catch a cupcake thief! Mama Tova's shop in Greenfield is so famous that every day, people line up around the block to buy her cupcakes. But when someone breaks into her kitchen, it's clear that her secret recipe is in danger. The Aldens follow the suspects to a bake-off where they must find the culprit using their mystery-solving skills - and their taste buds, too!