Nancy Drew Mystery Stories #117: Mystery on the Menu (1994)
George and Bess apparently love watching cooking shows and reading cooking magazines. When one ran a contest for an original recipe for Valentine's Day, they had a bet. George entered a recipe for raspberry chiffon cake that her grandmother once made and won, so Bess owes her 20 bucks. Three winners get free dessert cooking lessons from some major cooking school. Since anyone else can sign up and pay for the same lessons, Nancy and Bess decide to go along too. They quickly meet Sophie, the woman who runs the cooking school, and her head administrator, Baird. The girls also meet Paul and Lila, the other two winners, and Gloria, a woman who signed up for the classes, as well as Regis and Alicia, the two instructors for the classes. Regis has his own restaurant in NYC, while Alicia has a restaurant in New Orleans. Not only does Regis make it clear that he dislikes Alicia, but he also brings two yappy little dogs with him. It doesn't take long before Nancy discovers...