Recipe: Mushrooms in Sour Cream (Russian Recipe)

Mushrooms in Sour cream recipe -
Recipe source: Olga Timokhina's collection
Cuisine: Russian

1 1/2 kg white mushrooms
2 tbsp butter
2 onion
1 1/2 cups beef stock
1 tbsp flour
1 cup sour cream
salt and pepper

Wash mushrooms in cold water, cut into thin pieces, slicing the mushroom along its length to preserve its form. Place butter in covered pan, add the mushrooms, add some finely chopped onions that have been separately cooked, a little salt and pepper, and cook the mushrooms until they are medium soft, at which point reduce the heat to a very low level. Add beef stock, mixed with flour over very low heat until the consistency of gravy has been reached, to mushrooms and then add sour cream and mix. Cook on low heat for 10 minutes.