Count on third-grader Grace to cook up a creative compromise just in time to save the day at the cupcake-themed school fair.

Siblings Jack and Anna decide to surprise their father with cupcakes for his birthday, but when ingredients begin falling into the cupcake batter they have no idea how the treats will turn out.

Twelve-year-old Foster McFee and her mother escape from her mother's abusive boyfriend and end up in the small town of Culpepper, West Virginia, where they use their strengths and challenge themselves to build a new life, with the help of the friends they make there.

When Emma goes for a modeling gig, Katie tags along for support, but when the agency chooses to go with Katie instead, Emma finds herself jealous.

When Hollywood star Romaine Ford asks Emma to make cupcakes for her wedding, she needs the young baker to keep it a secret, even from the rest of the Cupcake Club.

When Katie's mom asks her to spend time with Emily, her boyfriend's daughter, Katie brings her to a meeting of the Cupcake Club and things go well, but maybe too well for Katie's liking.

Reaching a compromise with her parents when they say she is too young to attend a concert alone, Mia discovers that she is being cyberbullied on social media and teams up with her fellow Cupcake Club members to discover who is behind the attacks.

In the midst of a terrible week, Mia receives a lucky charm from her cousins from Puerto Rico, and when her luck turns around, she attributes it to the charm, but when her bad luck returns, she must come to grips with the truth.

Mia enters a design-a-dress contest without knowing just how much work designing and sewing a dress could be. Things get eve worse when she tries to finish her creation during a Halloween cupcake party.

Worrying about her fashion prospects when she learns that she has to get both braces and glasses, Mia receives help from her stylish mom and is reassured by her Cupcake Club friends that she is still the same old Mia.