Czech Kolackies

Directions

1. 1
   Dissolve yeast in milk and sugar; let set for about 5 minutes. Add 5 cups of sifted flour.
2. 2
   Mix well.
3. 3
   Let set in a warm place for about 1/2 hour.
4. 4
   Add egg yolks, shortening, salt and rest of flour.
5. 5
   Mix and knead well (needs to be a soft dough).
6. 6
   Let set in a warm place for an hour, until doubled in bulk.