The Gourmet Zombie — Paul Zindel

The most famous chefs in New York are dropping like flies--each seeming to die accidentally. But P.C. and Mac notice a bizarre connection: every one has met his maker courtesy of his signature dish! Who is killing the cooks of Gotham, and, whats more, will there be a decent cook left alive to cater P.C. and Mac's joint sixteenth-birthday bash?