Yeast Dough for Pierogi

• 2 cups flour
• 2 egg whites, beaten
• 1 cup lukewarm milk

Scald milk and cool to lukewarm. Break yeast into milk. Add to flour, beat well and set aside to rise. Beat eggs with a tablespoon of sugar. Add to beaten yolks, butter, sugar and salt. Beat thoroughly. Fold in egg whites. Add 2 cups of flour and beat with spoon until the dough no longer sticks to the