French Onion Soup Casserole

Here’s a cozy French Onion Soup Casserole—all the rich, savory flavor of classic French onion soup baked into a cheesy, comforting dish. 🧅🧀🥘

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Ingredients (Serves 4–6)

• 4 large onions, thinly sliced
• 3 tablespoons butter
• 2 teaspoons olive oil
• 2 cloves garlic, minced
• 1 teaspoon sugar (optional, helps caramelize onions)
• 1 teaspoon salt
• ½ teaspoon black pepper
• 2 tablespoons all-purpose flour
• 2 cups beef broth (or vegetable broth for a lighter version)
• 1 teaspoon Worcestershire sauce (optional)
• 1 teaspoon fresh thyme or ½ teaspoon dried thyme
• 4–6 slices French bread or baguette, toasted
• 1 ½ cups shredded Gruyère cheese (or Swiss/Provolone mix)

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