The Cookbook of Unknown Ladies is a web project of Curious Recipes and Hidden Histories taken from a book in the collection of London's Westminster Archives Centre, and for Thanksgiving (or the day after), what could be better than a pudding made with bog, i.e., cranberries? A transcription is given at A Bog Berry Pudding. Looks to me like mixing together whole sweetened cranberry sauce, egg yolks, pumpkin pie spices, rose water (if you can find it), sherry, lemon peel and a whole lot of butter, then baking it should do the trick of giving you a taste not unlike something that might have appeared on an18th C table. Even if you only describe it in an historical fiction story, you might have mouths watering. Happy Thanksgiving!