French Onion Soup Casserole
A cozy and comforting twist on the classic French Onion Soup, baked into a bubbling, cheesy casserole. Perfect for chilly evenings or impressing dinner guests, this dish brings deep, rich flavors with layers of caramelized onions, toasted bread, and melted cheese. Serve with a fresh salad or crunchy garlic bread for the ultimate experience.
Ingredients
- 3 tbsp unsalted butter
- 3 large sweet onions thinly sliced
- 2 cloves garlic minced
- Salt and pepper to taste
- 1 tsp thyme fresh or dried
- 2 tbsp all-purpose flour
- 1/2 cup dry white wine
- 2 cups beef broth
- 1 cup chicken broth
- 6 slices day-old French bread or baguette toasted
- 1 1/2 cups grated Gruyère cheese
- 1/2 cup grated Parmesan cheese
- 1/4 cup fresh parsley chopped (for garnish)
- Cooking spray
Instructions
- Preheat oven to 400°F (200°C). Spray a 9x13 inch baking dish with cooking spray.
- Melt butter in a large pan over medium heat. Add onions and cook, stirring occasionally, until soft and golden brown, about 15 minutes. Add garlic, salt, pepper, and thyme; cook for 1 minute.
- Stir in flour and cook for 2 minutes. Pour in the wine and simmer until reduced slightly. Add beef and chicken broths; simmer for 10 minutes.
- Pour half of the onion mixture into the prepared dish. Layer half of the toasted bread on top, then sprinkle with half of both cheeses. Repeat layers with remaining ingredients.
- Bake uncovered for 20-25 minutes, or until cheese is bubbly and golden.
- Let it sit for a few minutes to set. Garnish with fresh parsley before serving.
Notes
Variations & Tips:
- Swap beef broth with chicken or veggie broth for a different flavor.
- Experiment with cheeses like sharp cheddar or mozzarella.
- Use gluten-free bread for a gluten-free option.
- Prep ahead and bake when ready. For a time-saver, use store-bought caramelized onions.
Nutrition
Serving: 300gCalories: 450kcal
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