If you love French onion soup but wish it could be easier to enjoy as a comforting weeknight meal, our French Onion Orzo Bake is the perfect solution. This baked casserole transforms tender orzo pasta, caramelized onions, rich broth, and melty cheese into a cozy, flavorful dish that is perfect for lunch, dinner, or even a comforting side.

By combining the deep, sweet flavor of caramelized onions with the creamy, cheesy texture of a baked pasta dish, this recipe offers a gourmet twist on traditional comfort food. It’s a one-dish wonder that’s impressive enough for guests but simple enough for busy weeknights.

Ingredients

For the Bake:

1 cup orzo pasta
3 large yellow onions, thinly sliced
2 tbsp unsalted butter
1 tbsp olive oil
3 cloves garlic, minced
1 tsp fresh thyme (or 1/2 tsp dried)
2 cups beef or vegetable broth
1/2 cup grated Gruyère cheese
1/4 cup Parmesan cheese, grated
Salt and pepper, to taste
1 tbsp flour (optional, for thickening)

Optional Toppings:

Extra Gruyère or Parmesan for broiling
Fresh parsley for garnish

Instructions

Preheat Oven: Preheat your oven to 375°F (190°C). Grease a small baking dish with butter or nonstick spray.
Caramelize Onions: In a large skillet, heat butter and olive oil over medium heat. Add sliced onions and cook, stirring occasionally, for 25–30 minutes until deeply golden and caramelized. Add garlic and thyme during the last 2 minutes.
Cook Orzo: While onions are cooking, bring a pot of salted water to a boil and cook orzo for 1–2 minutes less than package instructions. Drain and set aside.
Combine Ingredients: In the skillet with caramelized onions, sprinkle the flour (if using) and stir to coat. Gradually add broth, stirring until slightly thickened. Remove from heat and fold in cooked orzo and 1/2 cup Gruyère cheese. Season with salt and pepper.
Assemble Bake: Pour the mixture into the prepared baking dish. Sprinkle Parmesan cheese evenly on top.
Bake: Bake uncovered for 20–25 minutes until the top is golden and bubbly. Optional: broil for 2–3 minutes for extra crispy cheese topping.
Serve: Let cool slightly, garnish with fresh parsley if desired, and serve warm.

Tips for the Perfect French Onion Orzo Bake

Caramelize Slowly: Don’t rush the onions—low and slow ensures deep flavor.
Use Gruyère: Its nutty, melty quality is essential for authenticity; Swiss cheese can work in a pinch.
Broil for Texture: A quick broil at the end adds a golden, slightly crunchy topping.
Make Ahead: Assemble the dish, cover, and refrigerate for up to 24 hours before baking.