Sand Tarts (real Old German Style)
Cream the butter and sugar together. Slowly add the flour, working it in well. Add the well-beaten eggs and mix thoroughly. Chill over night. Roll out thin on lightly floured board; brush cookies with the egg white which has been slightly beaten, sprinkle with sugar and a little cinnamon and press 1/2 pecan into center of cookie. Bake at 350-F about 10 minutes.
Source: Pennsylvania Dutch Cook Book - Fine Old Recipes, Culinary Arts Press, 1936.