Classic French Onion Soup
Updated: Jan 20, 2022
Warm up with this flavorful and rich soup!
The CSR-1TB Range
POV-003 or POV-013 Convection Oven
4 tablespoons (1/2 stick) unsalted butter 3 to 3-1/2 pounds (about 6 large) yellow onions, thinly sliced Kosher or sea salt and freshly ground black pepper 2 teaspoons flour 1 cup dry white wine 8 cups beef or chicken stock (homemade or low-sodium store-bought) 1 parsley sprig 1 thyme sprig 1 bay leaf tied together in a bundle 1 baguette, cut into 1/2-inch rounds 1-1/2 cups (about 6 ounces) shredded Gruyere cheese
In a large, wide soup pot, melt butter over medium heat. Add onions and season with salt and pepper to taste. Cook gently, stirring frequently, until onions are very soft and have begun to turn a deep blond shade, about 40 minutes. (It’s important to avoid browning them.)
Stir in flour and cook 3 to 4 minutes, stirring frequently. Pour in wine and increase heat to medium-high, stirring and scraping the bottom of the pot to loosen any caramelized juices. Cook until liquid is almost completely reduced. Add stock.
Tie herbs together with string or place inside a piece of cheesecloth. Add herb bundle and bring to a simmer.
Season lightly with salt and pepper and simmer 20 to 30 minutes. Onions should be soft but not falling apart. (You may make this soup ahead to this point if you like, and hold it for several hours or even a few days before serving.)
Just before serving, heat oven to 350 degrees. Arrange baguette slices on oven rack. Toast lightly, 7 to 10 minutes, and set aside. Increase temperature to 450 degrees. Set six ovenproof crocks on a heavy baking sheet, and ladle hot soup into them. (Discard herb bundles.)
Float toasts on soup and top each with a handful (¼ cup) of Gruyere.
Bake until cheese is melted, bubbly, and barely golden, 10 to 12 minutes. Serve immediately when cheese is gooey and crocks are hot.