Twelve-year-old Petunia Fair spends her free time cooking meals from her Grammy Joanne's recipe book and watching her favorite reality cooking show, Chef Extraordinaire. When Petunia's idol, the world-renowned Chef Jordan Ramikin, announces that the first round of his newest culinary competition, Chef Extraordinaire, Junior, will take place in her home town of Bakerton, Pennsylvania, Petunia's dreams of having a cookbook and restaurant of her very own may be closer than she thinks. All she has to do is do what she does best-cook. Easy as apple pie, right?!

But in order for her dreams to come true, she'll need to out-chef not only the snotty Bianca Friday (who just so happens to be the daughter of her dad's new "lady friend"), but also Luke Paring (Petunia's super cute and super talented crush), all while coming to terms with the death of her greatest culinary inspiration of all-her Grammy Joanne.