One of Birr's many treasures is a manuscript dating from 1666 which features the earliest known Irish Potato recipe, a Potato Pie, filled with potatoes, rosewater, currants, raisins, orange peel, cinnamon, white wine, egg yolks and sugar! Birr Castle Dorothy Parsons' Book of Choice Receipts, 1666 First Course Marrow Pudding Bisk An Oleo Pease Porridge Grand Sallet Second Course Baked Pheasant Potatoe Pie Spinach Tart To Roast a Rabbit with a Pudding in the Belly Sweetmeats Jumballs Caraway Cake Clear Jelly of Pippins