Warm, indulgent, and packed with rich umami flavors, this French Onion & Mushroom Soup is a cozy upgrade to the classic. Caramelized onions meet earthy mushrooms, fresh herbs, and a gooey, golden blanket of melted cheese, all crowned with a buttery croissant for the ultimate comfort food experience.
Ingredients
4 large yellow onions, thinly sliced
2 tablespoons unsalted butter
1 tablespoon olive oil
3 cloves garlic, minced
8 oz cremini or baby bella mushrooms, sliced
1 tablespoon fresh thyme leaves
1/2 teaspoon dried oregano
Salt and freshly ground black pepper, to taste
1 tablespoon all-purpose flour
1/2 cup dry white wine
5 cups beef or vegetable broth
1 tablespoon Worcestershire sauce
1 bay leaf
1/2 teaspoon sugar (optional, to enhance caramelization)
4 croissants, halved or split
1 1/2 cups grated Gruyère cheese
1/2 cup grated Parmesan cheese
Fresh parsley or thyme for garnish (optional)
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