Nancy Drew- Mystery on the menu by, Carolyn Keene

It is about how George entered into a baking contest and won, so now she get's to visit a cooking school and she gets to take lessons there! George takes along her friends Nancy Drew and Bess Marvin. Soon a mystery appears because someone is out to get a famous chef named Regis Brady. He get's poisoned when someone puts Lily Of the Valley flowers into his saled, and almost get's killed when suddenly a knife comes flying at him! Nancy, Bess, and George all help to find out who is doing all of these things!  -Ruby