# Roast the flour
with butter for about 2-3 minutes. Remove it from the stove and rest it to cool down.
# Add yogurt
on it and whisk until the mixture turns smooth and homogenous. Add 3 cups cold water and mix it.
# Place the pot again over medium heat. Cook it by stirring constantly until it reaches boiling temperature. When it reaches boiling temperature, add chopped but uncooked mushroom
s. Then, cook the soup for about 15 minutes more.
# Whisk the mixture of cream and milk
in another bowl and add into the soup.
# Add 3 cups hot water and salt into the soup. Then boil it for a while more.
# Serve it hot.