The Main Corpse by Diane Mott Davidson

She has been called "the Julia Child of mystery writers." Now, Diane Mott Davidson, who masterfully served up The Last Suppers, Killer Pancake, and Dying for Chocolate, returns with an irresistible five-star helping of suspense. When caterer Goldy Schulz takes a job with a multimillion-dollar financial firm, she finds herself in a high-stakes world where someone is out to make a killing....
Goldy, owner of Goldilocks' Catering, barely weathered a disastrous spring in which relentless rains and driving snow put a real damper on her business. But now, thanks to her best friend, Marla, the Colorado caterer is suddenly cooking up a storm...lovingly preparing Crab Quesadillas, Tomato-Brie Pie, and Gold Foil-Wrapped Fudge Bars for her wealthy new client, Prospect Financial Partners.