Fry the chopped onion in butter in a saucepan for 4-5 minutes on low heat, then add the garlic and fry everything together for another 2 minutes.
Add mushrooms, stir and fry everything together for 7 minutes, stirring.
Add all purpose flour and stir, fry for another 2 minutes.
Pour in the broth, add salt and spices. Stir until no lumps of flour remain. Cover the pan with a lid and cook on low heat for another 15 minutes.
Pour in the whipping cream and heat the soup, stirring, for another 2 minutes, without bringing it to a boil. Let the soup brew, covered, for 10 minutes, after which it is ready to serve. Small mushrooms fried in vegetable oil, as well as croutons, grated cheese, and fresh chopped herbs are suitable for serving.