6 servings
4 tablespoons unsalted butter
3 sweet onions, thinly sliced
2 garlic cloves, minced
6 cups beef broth
¼ cup brandy
1 bay leaf
2 tablespoons chopped fresh thyme
Kosher salt and freshly ground black pepper
⅓ baguette, sliced
1½ cups shredded Gruyère cheese
Chopped fresh chives, for serving
1. In a large skillet, melt the butter over medium heat. Add the onions and sauté until tender and beginning to soften, about 5 minutes. Reduce heat to low and continue to cook until the onions are golden and caramelized, 15 to 20 minutes. Stir in the garlic.
2. Transfer the onion mixture to the bowl of a slow cooker and add the beef broth, brandy, bay leaf and thyme. Turn the slow cooker on low and cook until the soup has good flavor, 6½ to 7 hours.
3. Season the soup with salt and pepper. Preheat the broiler on your oven.
4. Ladle the soup into oven-safe bowls and place 2 slices of baguette on top of each. Mound ¼ cup of Gruyère on top of the baguette. Broil the soup until the cheese is melted and well-browned, 2 to 3 minutes. Serve immediately, garnished with chives.
https://www.purewow.com/recipes/slow-cooker-french-onion-soup