In Kievan Rus, borsch was prepared from the edible leaves of the hogweed - hence the name. Later they began to cook with beets, and from the XIX century add potatoes.
Sour cream - a biscuit puff cake, is considered a Russian confectionery. The difference between the sour cream and other biscuit cakes is the addition of sour cream in the dough for cakes. In addition, sour cream is also used for the manufacture of cream, which smears cakes.