Restaurant-Style French Onion Soup

By Jenny

4.81 / 5

20min

1h 15min

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½ cup butter
8 onions sliced
2 cloves garlic crushed
½ teaspoon salt or to taste
½ teaspoon ground black pepper or to taste
1 teaspoon dried thyme
1 cup red wine
1 tablespoon sherry
2 tablespoons all-purpose flour
2 quarts beef broth
1 French baguette cut into 1/2-inch thick slices
olive oil or as needed
6 slices Swiss cheese
6 slices provolone cheese