This French Onion Soup Casserole is a comforting and flavorful dish, perfect for a cozy weeknight dinner. It captures the essence of French onion soup in a casserole form, with caramelized onions cooked in a rich broth and topped with melted Gruyère and Parmesan cheese.
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Ingredients:
Ingredient Quantity
Unsalted butter 3 tablespoons
Sweet onions, thinly sliced 3 large
Garlic cloves, minced 2
Salt To taste
Black pepper To taste
Fresh or dried thyme 1 teaspoon
All-purpose flour 2 tablespoons
Dry white wine 1/2 cup
Beef broth 2 cups
Chicken broth 1 cup
Day-old French bread or baguette, toasted 6 slices
Gruyère cheese, grated 1 1/2 cups
Parmesan cheese, grated 1/2 cup
Fresh parsley, chopped (for garnish) 1/4 cup
Cooking spray For the baking dish
Instructions:
Preheat your oven to 400°F (200°C) and prepare a 9×13 inch baking dish with cooking spray.
In a large pan over medium heat, melt the butter and caramelize the sliced onions until soft, sweet, and golden brown. This takes about 15 minutes, so be patient! Stir occasionally for even browning.
Add the minced garlic, salt, pepper, and thyme to the onions and cook for another minute.
Sprinkle the flour over the onions and cook for a couple of minutes to get rid of the raw flour taste. Then, pour in the white wine and simmer until the liquid reduces slightly.
Add both beef and chicken broths to the pan and bring everything to a simmer. Let it simmer for another 10 minutes, allowing the flavors to meld.
Now it’s time to assemble the casserole! Pour half of the onion mixture into the baking dish. Layer half of the toasted bread slices on top, then sprinkle with half of the Gruyère and Parmesan cheeses. Repeat these layers with the remaining ingredients.
Bake the casserole uncovered for 20-25 minutes, or until the cheese is bubbly and beautifully browned on the edges.
Let the casserole sit for a few minutes before serving to allow it to set. Garnish with fresh chopped parsley for a touch of color and enjoy!
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