The Truth About Twinkie Pie, Kat Yeh. DiDi (Delta Dawn II) and GiGi (Galileo Galilee), sisters, move from the poverty of South Carolina to Long Island, New York to begin again after their mother died. With the million dollar winnings from a cooking contest, Gigi attends a new school and DiDi, a high school drop out, becomes a hairstylist. At their old school, they were given the nicknames Double D and Double G, bra sizes, so GiGi now wants to be called Leia, to go along with her fresh start. The first day of school, GiGi bumps into the cutest boy in the school, Trip, and lands on her rear. From that moment on, they become best friends, much to the dismay of Mace, who might be feeling a bit threatened, because she keeps sending GiGi tagger looks.

Even though they have a million dollars in the bank, DiDi keeps the purse strings tight, insisting GiGi study every minute so can go to college and become the scientist she wants to be. One night while having a sleepover with Haven and Allie, she tells them all about Cherries in the Snow lipstick, the one lipstick her mother wore but is now discontinued. They laugh and giggle, while making phone calls searching for a distributor with a special reissue of the brand. When they stumble upon a voice saying they have it available, GiGi turns serious and Allie gives her credit card information to purchase two tubes, one for her and one for her sister as a surprise birthday present. When asked for her name, she gives Delta Dawn Barnes, her mother's name, the service rep asks if she wants it shipped to the Red Cedar Road address? GiGi hangs up the phone and needs to go home.

GiGi's life takes an abrupt turn. She has questions and won't talk to DiDi, who has become unknown to her, because of her seemingly new relationship with arch enemy, Mace. She asks Trip to run away with her to her childhood home on Red Cedar Road, in search of answers. With the plans all set, meeting at the train station in place, it is not Trip that meets her there, but Mace, who takes complete control of getting them to her birth place, including paying for hotel and food. When she finally makes her way to Red Cedar Road, her life takes another abrupt turn. Thankfully, Mace doesn't push for answers as they make the long way back home in silence. Once home, DiDi explains the past, but GiGi is not listening.

Sprinkled throughout the book are recipes, including Twinkie Pie, that Delta Dawn once had the talent for making until Delta Dawn II, or DiDi, stole the recipe box and now makes herself.

Brace yourself for heartache as GiGi comes of age under less than desirable circumstances. Her sister is not who she thought she was, Trip is not the boy she thought he was and Mace is not the girl she thought she was. And yet, all will be ok.