Easy Pierogi

Directions

1. 1
   Rub thoroughly until free from lumps.
2. 2
   Add butter, egg yolks, salt, sugar and flour.
3. 3
   Beat thoroughly until light.
4. 4
   Add well beaten egg whites and fold in, carefully.
5. 5
   Turn out onto floured board.
6. 6
   Roll with hands into long narow roll.
7. 7
   Flatten and cut slantwise into pieces 2 inches long.
8. 8
   Cook in boiling salted water until they rise to the top. Lift with straining spoon and cover with lightly browned, buttered crumbs.
9. 9
   They are delicious with sour cream flavored with cinnamon and sugar.