Sour Cream Mushroom Soup

Ingredients
Directions
Melt butter in a large heavy saucepan over medium heat. Add tarragon and nutmeg and cook for 1 minute. Add onions and cook until softened and translucent. Add mushrooms and cook until tender but not soft. Add flour and cook, stirring for 3 to 4 minutes. Gradually stir in beef broth and heat, stirring, just until boiling. Reduce heat and stir in sour cream. Cook and stir until lumps dissolve. Add half-and-half and whipping cream. Season with salt, pepper, lemon juice, and hot pepper sauce. Heat gently, stirring frequently, until hot but not boiling.