Gravy Soup (Gerostete Mehlsuppe — Switzerland)

5 tablespoons butter, melted
5 tablespoons flour
7 cups stock
Croutons
Grated Swiss cheese

Add flour to melted butter. Fry over low heat until deep brown. Add stock. Mix well. Boil at least 1 hour. Season to taste. Add croutons and grated Swiss cheese before serving.