Minions and Magic by Debra Dunbar

Glenda’s magic might be in healing, but she’s more proud of her non-witch talents. When it comes to crafting culinary delights, everyone inside and outside of Accident knows that Glenda is the best.
So when Xavier, a sexy crossroads demon, challenges her to a contest, Glenda doesn’t think twice before accepting. But fun and flirty goes straight to hell in a picnic hamper when her catering clients become horribly sick and Xavier is the only one who had the opportunity to tamper with the food.
Can Glenda win against Xavier, or will she lose and forfeit her body and soul to the demon who already has her heart?