Add yeast to milk and let stand several minutes to dissolve. Stir in salt and
Put butter into a large bowl; add 1 whole egg and 1 egg yolk, beating very
hard. Continue adding 1 whole egg and additional yolk, followed each time by hard
beating. When all the eggs have been used, mix in yeast and then flour, beating
hard. Cover with a towel and place in a warm place until double in size.
Pinch off pieces of dough the size of a large walnut. Place 2 inches apart on
a greased baking sheet; cover, and let rise in a warm place for 30 minutes.
Press a hollow in the center of each piece with fingers and fill the cavity with
Prune Filling, jam or marmalade. Bake at 350 degrees F for 20 to 25 minutes. Remove
from oven. When cool, sprinkle tops generously with sugar.
Prune Filling: When prunes are tender, drain; discard pits and chop prunes coarsely. Stir in
sugar, butter, cinnamon and vanilla extract. Add more sugar if desired.