In the bucket of a bread machine pour warm whey (150 ml.) add the yeast and leave for 5 minutes.

In a bowl pour the remaining warm whey and add sour cream, stir.

To the yeast mixture and pour the serum with sour cream.

On top of sift flour, add salt and sugar.

Set the bucket in the bread machine and select the program "Basic white bread". If no bread machine, you can cook this bread in the oven. I tried both ways, I think the bread baked in the oven were even better. The dough is kneaded in the same manner. Cover with cling film and leave in a warm place to increase in volume in 2-2.5 times. When the dough is ready, roll it out, fold in half, in half again. Put the dough in the form greased with vegetable oil, cover with a towel and leave for 30 minutes. Bake bread in preheated oven at 190 degrees for about 30-35 minutes.