Cream the butter and sugar thoroughly; add the eggs one at a time, beating well after each addition. Dissolve the soda in the cream and add to the mixture. Sift in flour until dough is stiff enough to handle. Chill over night. In the morning, roll out thin on floured board and cut with cookie cutter. Bake at 350-F about 10 minutes. Source: Pennsylvania Dutch Cook Book - Fine Old Recipes, Culinary Arts Press, 1936.