Additional pancakes

Pour buckwheat flour into an enameled saucepan, pour two glasses of warm milk, having previously diluted yeast in it. Stir everything up well and put it in a warm place. When the dough is up, stir it with a wooden spoon, pour in the rest of the milk, pour in the wheat flour and mix well. Put the dough in a warm place again. After the dough fits, add egg yolks to it, ground with two tablespoons of melted butter, sugar, salt. Mix everything well. Whisk the cream, add egg whites to them and whisk again. Add them to the dough, stir and put in a warm place for 15 - 20 minutes. Bake pancakes in the usual way.