Haven’t made it in a long time, but it was my go-to French onion soup recipe for many years. From the Silver Palate Cookbook, it’s pretty simple and straightforward:
4 TB butter
2 TB olive oil
6 cups sliced yellow onions
4 cloves garlic, minced
1 tsp sugar
1/3 cup Cognac
1 TB Dijon mustard
1/2 tsp dried thyme
3 TB all-purpose flour
3 quarts beef stock
1 1/2 cups dry white wine
salt and pepper to taste
Heat butter and oil in a large stock pot. Add onions and cook over high heat, stirring occasionally, for 15 minutes. Add the garlic and sugar. Reduce heat to medium and cook, stirring occasionally, until onions are golden brown, about 40 minutes.
Pour in Cognac, warm it and flame with a match. When the flames subside, add the mustard and thyme. Stir in the flour and cook, stirring frequently, for 3 minutes.
Gradually stir in the stock and wine. Season to taste with salt and pepper. Simmer uncovered for 1 hour.
Croutons:
8 thick slices French bread
4 TB butter at room temperature
4 TB olive oil
3 cloves garlic, minced
spread one side of each bread slice with 1 1/2 tsp butter and 1 1/2 tsp oil. Sprinkle with the garlic. Toast the prepared side only on a baking sheet until crusty and golden, 12-15 minutes.
Cheese Gratinee:
8 oz shredded Gruyere
8 oz shredded smoked mozzarella
4 oz grated Parmesan
Combine the 3 cheeses.
To assemble:
Preheat broiler. Ladle hot soup into 8 oven-proof soup bowls to fill three-fourths full. Float a crouton in the center of each bowl. Top each bowl generously with the cheese mixture. Broil 6 inches from the heat until the cheese is melted and bubbling, about 4-5 minutes. Serve immediately.
Hope you enjoy it, if you decide to use it!