Katie starts to realize that doing what you love always makes the batter sweeter.

When Katie's best friend Callie leaves her for a clique called the Popular Girls Club on the first day of middle school, Katie decides to find a group that she can join.

Alexis Becker loves to organize and plan and set goals, which is why she is in charge of the business end of the Cupcake Club. But when she suddenly develops a major crush on Matt Taylor - who happens to be Emma's brother - things get a little disorganized.

Alexis feels lonely when her best friend goes on a family trip. After everyone has a time feeling left out of the group, the girls soon realize that one can't have enough friends.

Katie has a tough time keeping one secret...what happens when she has to keep four? All of the cupcake girls have secrets and are ready to burst! Katie loves knowing a secret; it's just tough for her to keep them! And in this story all her friends have told her a secret! From new crushes to someone cheating on a math test, Katie doesn't know what to do with all of this juicy information! Can the Cupcake Club survive with everyone keeping secrets from...