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French Onion Soup Casserole
Ingredients
- 25 cup unsalted butter
- 5 mediumvidalia onions
thinly sliced, about 3 lb.
- 2 tspkosher salt
- 5 teaspoon black pepper
- 3thyme sprigs
- 2flat-leaf parsley sprigs
- 2bay leaves
- 1baguette
thinly sliced
- 33 cup all-purpose flour
- 3 creduced-sodium beef broth
- 5 cup sherry
- 8 ozgruyère cheese
shredded, about 2 cups
- 1 tspfresh thyme leaves
Directions
- 1
Melt butter in a Dutch oven over medium-low; add onions, salt, pepper, thyme and parsley sprigs, and bay leaves; cook, stirring often, until onions are golden brown, about 1 hour.
- 2
Meanwhile, preheat oven to 350°F. Arrange baguette slices in a single layer on a baking sheet. Bake in preheated oven until lightly toasted, 12 minutes. Set aside.
- 3
Remove and discard thyme and parsley sprigs and bay leaves from onion mixture. Add flour, and cook, stirring constantly, 2 minutes. Add broth and sherry; bring to a boil over high. Boil, stirring constantly, until slightly thickened, 2 to 3 minutes.
- 4
Layer half of the toasted baguette slices in a 13- x 9-inch baking dish. Spoon onion mixture evenly over bread. Top evenly with remaining baguette slices. Sprinkle with cheese; cover with aluminum foil.
- 5
Bake in preheated oven 30 minutes. Increase heat to broil. Remove foil; broil until cheese is bubbly, about 3 minutes. Sprinkle with thyme leaves.
French Onion Soup Casserole
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Ratings & Reviews
Based on 16 ratings
Rating Breakdown
About this Recipe
Craving the deep, savory comfort of classic French onion soup, but in an even more indulgent, easy-to-serve format? This French Onion Soup Casserole is your answer, transforming a beloved bistro staple into a heartwarming, cheesy baked dish perfect for any occasion.
What makes this French Onion Soup Casserole truly exceptional is its foundation of naturally sweet Vidalia onions. When thinly sliced and caramelized, these onions develop an unparalleled depth of flavor that forms the soul of the dish. Layered with crusty baguette, a rich broth infused with sherry and herbs, and generous amounts of melty Gruyère, it’s a symphony of textures and tastes that far surpasses typical weeknight fare.
Prepare for a truly satisfying experience that balances richness with a delicate sweetness. You'll enjoy the tender, deeply flavored caramelized Vidalia onions, the savory complexity from the reduced-sodium beef broth and a touch of sherry, and the irresistible gooeyness of the melted Gruyère cheese. Each spoonful offers a piece of softened, flavor-soaked baguette, acting as a delicious sponge for all those incredible juices. This casserole delivers all the familiar, comforting notes of French onion soup in a wonderfully cohesive, baked dish, making it a fantastic entree that feels both gourmet and approachable.
While Gruyère is the traditional choice, feel free to experiment with other excellent melting cheeses like Comté or Emmental if you're looking to vary the flavor profile. For the bread, a sturdy sourdough could also work beautifully in place of baguette, offering a slightly tangier counterpoint. If you prefer a brighter, herbaceous note, a sprinkle of fresh chives or flat-leaf parsley before serving can add a lovely touch.
This robust French Onion Soup Casserole serves as a magnificent entree, ideal for cozy gatherings, a comforting family dinner, or a special weekend meal. Pair it with a simple, crisp green salad dressed with a light vinaigrette to cut through the richness and complete the meal.