Russian Pancakes

For 1 kg of wheaten flour you’ll need:

4-5 glasses of milk
3 tablespoons of butter
2 eggs
2 tablespoons of sugar
1,5 teaspoon of salt
40 gr. yeast

Dissolve the yeast in 2 glasses of warm water and add 500 gr. flour. Mix until smooth, cover with a cloth and set aside in a warm place for about an hour, or until the batter becomes bubbly. Add salt, sugar, egg yolks, melted butter and mix thoroughly. Add the rest of the flour gradually and beat up until smooth. Pour in warm milk gradually, and mix the batter thoroughly. Cover with a cloth and set aside in a warm place to rise. After the batter rises, beat until it is settled and then stir in beaten egg whites. As soon as the batter rises, cook the pancakes on a hot griddle. The batter should rise no less than 3 times.