Just Add Kelly is the tenth episode of Season 3. It premiered on February 1st, 2019 on Amazon Video.
Darbie and Hannah in the previous episode realize that Kelly is the real night bandit, who had been turning into Erin and confronting Mama P for her recipe (Keep the Cookbook Casserole) which could not be made without Morbium. She also stole a pie tin which Chuck used to create the Mulberry Pie (It was a recipe used to stay immortal) which had locked his sister in the book.
After Kelly's birthday party, Darbie and Hannah inform Miss Silvers about Kelly's intentions to keep the cookbook forever, who has been tricking them for weeks. Miss Silvers then considers to call Becky where she is given the quiche to remind Becky of magic. During the conversation Mama P enters where they start discussing the recipes which the OCs had cooked when they were young , In Your Head Banana Bread, which is used to know what is going on Kelly .They realize that they need Livonian Sugar, so they return back to the trailer where Becky stalls Kelly as Darbie and Hannah grab the sugar from the trailer and then they all bake at Miss Silvers house. After baking, Miss Silvers informs the girls to write whatever they want to see with an icing pen.
Then, Darbie and Hannah reach to Kelly's house for their sleepover(which they always do on Kelly's birthday) where they try to stall them from making the recipe till night where they enjoy time with Terri in making Clouds Over Mars, a favorite recipe from their (The trio's) childhood. Whereas, at Springtown, Erin tells Jake about their move to an another town and also that she is going to get married, but Erin actually, wanted to inform Jake about the Pluot bread recipe which has been made into Springtown's menu.
At the Quinn's house, grandma Becky comes over to Kelly's house with an amazing idea in her mind. As she was cleaning up her attic, she finds a bunch Quinn home movies and decides to get a marathon or binge them.
After discovering that Kelly is the Night Bandit, Hannah and Darbie tell Ms. Silvers. They restore Becky's memories of magic and she suggests a spell to get inside Kelly's mind to see what's wrong with her. Mama P. returns to warn them about Kelly but they already know. During a sleepover at Kelly's, Darbie and Hannah keep stalling to avoid cooking. After Kelly falls asleep, they use the spell to get into Kelly's mind. They find that she has been acting that way because her mind got poisoned as a downside when she used cedronian to regrow the spice garden. They realize that the poison has been twisting Kelly's perspectives to make her think that Hannah and Darbie won't be her friends without the magic. The next morning, Hannah and Darbie cook a spell to show Kelly the truth. This restores Kelly back to herself. She apologizes but reveals that she had used a sleepwalking spell to get them to cook the spell. They're now tied to the book forever.
Sleepwalking Mulberry Salsa
Keep The Cookbook Casserole
In Your Head Banana Bread