There is a series of books call the Mitford Series about an Episcopalian Priest, by Jan Karon, which I love. There is a "secret" recipe for a marmelade cake that one of the church ladies makes every year for their bake sale. In one of the books she falls and breaks her arm and her jaw and winds up in hospital. All the women try to get the recipe out of her with the intent of making it exact for the sale; however, different versions start popping up everywhere! Anyway DH bought me the "Mitford Cookbook" last year with all the character's favourite recipes and of course the first one I made was the marmalade cake - not bad for fiction!
Living gluten/dairy/sugar/caffeine-free and loving it!