Put the onions, butter and garlic with the oil in a large pan and sweat until translucent. Add the roughly chopped mushrooms and season with salt. Cover and braise for 5 minutes.
Add the tomato paste, season with salt, pepper and paprika powder and pour in the broth. Add the chopped chives and chopped parsley. Now cook for 15 minutes with the lid closed over low heat. Stir in the cream.