Cream butter and sugar, then add the egg yolks and beat again. Stir in the sour cream and almond flavoring.
Sift nutmeg, soda and cream of tartar with the flour. Combine with creamed mixture to make a stiff dough. Fold in the egg whites.
Roll the dough about 1/8 inch thick and cut into desired shapes with cookie cutters. Sprinkle with sugar. Place on greased cookie sheets.
Bake 10 minutes in a preheated 375° oven. Will yield about 12 dozen cookies.