How to Make French Onion Soup
- 1In a deep skillet or Dutch oven, combine onions and butter. Cover and cook gently for 15 minutes or until onions are tender.
- 2Blend in salt and flour. Add beef stock and heat until boiling. Reduce heat and simmer covered for 1 hour.
- 3If desired, float toasted French bread slices on individual bowls of soup and spinkle with shredded Swiss and Parmesan cheeses. Heat in a 425 degree oven for 10 minutes.