Cream one-half cup of butter, add five yolks, two tablespoons of sugar,
grated rind of a lemon, one cup of thick sour cream and one ounce or two
cakes of yeast dissolved with a little sugar in two tablespoons of
lukewarm milk. Stir all together and add three cups of flour; mix and
drop from end of teaspoon on well-greased pans. Let rise until light in
a warm place. Place a raisin or cherry on the top of each cake, spread
with beaten white of egg, sprinkle with sugar and bake ten minutes in a
hot oven.