Clean the mushrooms, wash if necessary and cut into slices. Peel and finely chop the onion. Heat the fat in a pot and fry the onions in it. Add the mushrooms and fry. Season with salt and pepper.
Take out half of the mushrooms and put aside. Dust the rest of the mushrooms with flour and sauté them. Deglaze with broth and cream while stirring and bring to the boil. Puree the soup with a blender. Add cheese and let it melt. Season to taste with salt, pepper and nutmeg. Add remaining mushrooms. Wash chives and marjoram and dab dry. Cut the chives into small rolls, pluck the marjoram leaves from the stalks.
Season to taste with salt, pepper and nutmeg. Add remaining mushrooms. Wash chives and marjoram and dab dry. Cut the chives into small rolls, pluck the marjoram leaves from the stalks. Add to the soup except for a little garnish and stir in. Serve the soup with chives, marjoram and, if desired, sprinkled with pink berries