I recommend "Doomsday Chef Is Very Busy" to you. This book was a sci-fi space-doomsday crisis novel. It described that in the apocalypse, the protagonist, as a super intelligent entity, could only cook, but now she needed this skill to survive. In this world, people couldn't cook, but the protagonist's food was very delicious. This matches the plot you described, and it also meets your requirement of having a good cook. I hope you like this fairy's recommendation. Muah ~😗