This French onion chicken casserole brings together tender shredded chicken, rice and a creamy sauce made with sweet caramelized onions, then finishes it with melted Gruyere and a crunchy fried onion topping. It makes two hearty servings in a small baking dish, so it is perfect for using up rotisserie chicken and leftover rice. The flavor comes from one slowly caramelized onion deglazed with a little broth, which tastes like French onion soup without any canned soup or seasoning packets. I kept it to one skillet, one bowl and one small dish, so the cleanup stays as easy as the recipe.
Why you’ll like it
- Two generous servings, with no big pan of leftovers to work through.
- A smart way to use leftover or rotisserie chicken and cooked rice.
- Deep French onion flavor from real onions, broth and Gruyere.
- No canned soup, no packets and no half-used cans left in the fridge.
- The crunchy fried onion topping everyone loves about the viral version.
What is French onion chicken casserole?
French onion chicken casserole takes the flavors of French onion soup, sweet browned onions, savory broth and nutty melted cheese, and turns them into a creamy chicken bake. It has been one of the most shared comfort-food dinners on social media lately, especially quick versions that mix cooked chicken with rice and top everything with crispy fried onions.
Many popular versions rely on a can of cream of chicken soup, French onion dip or a packet of onion soup mix. They are easy, but they make a large dish and often leave you with half-used cans. This version keeps the idea, cooked chicken and rice in a creamy onion sauce under cheese and crunchy onions, and builds the flavor from scratch in a size that works for two.
What makes it work
Caramelized onion instead of a packet. Cooking the onion slowly in butter until deep golden brown brings out its natural sweetness. A splash of broth and a little Worcestershire sauce then lift the browned bits from the pan, giving the sauce the savory depth of French onion soup.
Broth and sour cream for the creamy part. Together they coat the chicken and rice and keep the casserole creamy as it bakes, without the saltiness of canned soup.
Cooked chicken and rice. Because everything going into the dish is already cooked, the oven’s job is simply to heat it through, melt the cheese and crisp the topping. That keeps the bake short.
Buttered fried onions. Tossing the fried onions with melted butter helps them toast evenly to a deep golden crunch.
Why it works for two
Most French onion chicken casseroles serve four to six and fill a large baking dish. Scaling one down by simply halving a can of soup leaves you with awkward leftovers. Here the sauce is built from ingredients you can measure in any amount: one onion, 1/3 cup of broth and 1/2 cup of sour cream.
The 1 1/2 cups of chicken and 1 cup of rice fit neatly in a small baking dish, so the filling stays deep enough to remain creamy while the top gets crisp. It is the kind of cozy dinner for two that makes a chilly evening feel a little slower and a lot more comfortable.
Ingredients for French onion chicken casserole
Only a few ingredients need a choice. Exact amounts are in the recipe card below.
- Yellow onion: one large onion is plenty. Yellow onions caramelize to a sweet, rich flavor; a sweet onion also works.
- Cooked chicken: shredded rotisserie chicken is the easiest choice, but any leftover roasted, poached or baked chicken works.
- Cooked rice: leftover white rice is ideal, because slightly dry grains soak up the sauce without turning mushy.
- Broth and Worcestershire sauce: low-sodium chicken broth keeps the salt in check, and Worcestershire adds the savory backbone of French onion soup.
- Sour cream: full-fat sour cream gives the creamiest result.
- Gruyere or Swiss cheese: the classic French onion soup cheeses, nutty and great at melting. Half goes into the filling and half on top.
- French fried onions: the crunchy canned onions sold near the green beans at most grocery stores.
- Thyme and garlic: small amounts that make the sauce taste like it simmered for hours.
How to make French onion chicken casserole
- Heat the oven to 350°F and grease a small baking dish.
- Soften the onion in butter, then caramelize it until deep golden brown.
- Add the garlic, thyme, broth and Worcestershire and simmer briefly.
- Mix the chicken, rice, sour cream, pepper, half the cheese and the onions, then spread it in the dish.
- Top with the remaining cheese and the buttered fried onions.
- Bake uncovered 20 to 25 minutes until bubbling and 165°F in the center.
- Rest 5 minutes and serve.
Step-by-step notes
Caramelizing the onion. Start over medium-high heat for 5 to 7 minutes, until the slices soften and turn translucent. Then lower the heat to medium-low and let them cook 15 to 20 minutes more, stirring every few minutes. They are ready when they are soft, jammy and deep golden brown. If brown bits start to stick, add a splash of the broth and scrape them up; that color is flavor.
Building the sauce. The garlic and thyme need only about 1 minute. When the broth goes in, simmer 1 to 2 minutes, just until it reduces slightly and looks glossy.
Assembling. Mix everything in a bowl rather than in the dish, so the sauce coats every piece of chicken and grain of rice. Spread it evenly and press it gently into the corners.
Checking doneness. The edges should bubble and the topping should be golden. Push an instant-read thermometer into the center; it should read 165°F. A short rest lets the sauce settle so it scoops neatly.
Tips for the best results
- Give the onion time; the slow second stage is where the French onion flavor develops.
- Use cold, leftover rice for the best texture.
- Shred the chicken into bite-size pieces so every forkful has chicken and rice.
- Toss the fried onions with the butter right before topping so they crisp evenly.
- Lay foil loosely over the top if the onions brown before the center is hot.
Swaps and variations
- Egg noodles: use cooked egg noodles in place of the rice for a noodle version.
- Cheese: mozzarella or provolone give a milder, stretchier topping than Gruyere.
- Onion: a sweet onion caramelizes a little faster and tastes sweeter.
- Chicken: any cooked chicken works, including leftover grilled or baked chicken breast.
What to serve with it
This casserole is rich and filling, so pair it with something green and fresh.
- Steamed green beans or broccoli.
- A simple green salad with a sharp vinaigrette.
- Roasted carrots or Brussels sprouts.
Bring the dish straight to the table, crispy onions and all, and let everyone dig in while it is still bubbling.
Storing and reheating
Refrigerate leftovers in a covered container within 2 hours and eat them within 3 to 4 days. Reheat in the oven or microwave until the center is hot (165°F). The fried onion topping softens in the fridge; a few minutes in the oven helps it crisp again.
When you have a little leftover chicken and rice and want something cozy, this is the casserole to make. Enjoy it warm, with crunchy onions on every bite.
Frequently asked questions
Can I make French onion chicken casserole with egg noodles instead of rice?
Yes. Use cooked egg noodles in place of the rice and follow the same steps.
Can I use raw chicken?
This recipe is designed for cooked chicken, because the short bake only heats the casserole through. Cook raw chicken first, or use rotisserie or leftover chicken.
Can I make it ahead?
Yes. Assemble it without the fried onion topping, cover and refrigerate it, then add the buttered onions just before baking. It may need a few extra minutes to reach 165°F in the center.
Print
French Onion Chicken and Rice Casserole for Two
- Total Time: 1 hour 5 minutes
- Yield: 2 servings
Description
The trending French onion chicken casserole for two: cooked chicken and rice in a creamy caramelized onion sauce with Gruyere and a crispy fried onion topping.
Ingredients
- 2 tablespoons unsalted butter, divided
- 1 large yellow onion, thinly sliced
- 1/4 teaspoon kosher salt
- 1 clove garlic, minced
- 1/2 teaspoon dried thyme
- 1/3 cup low-sodium chicken broth
- 1 teaspoon Worcestershire sauce
- 1 1/2 cups shredded cooked chicken (such as rotisserie)
- 1 cup cooked white rice
- 1/2 cup sour cream
- 1/4 teaspoon black pepper
- 1/2 cup shredded Gruyere or Swiss cheese, divided
- 1/2 cup French fried onions
- 1 tablespoon chopped fresh parsley (optional)
Instructions
- Heat the oven to 350°F and grease a small (1 1/2-quart) baking dish.
- Melt 1 tablespoon of the butter in a 10-inch skillet over medium-high heat. Add the onion and salt and cook 5 to 7 minutes, stirring, until soft. Lower the heat to medium-low and cook 15 to 20 minutes more, stirring now and then, until deep golden brown. Add a splash of the broth if the onions start to stick.
- Stir in the garlic and thyme and cook about 1 minute. Add the remaining broth and the Worcestershire sauce, scrape up the browned bits and simmer 1 to 2 minutes, until slightly reduced. Take the pan off the heat.
- In a bowl, mix the chicken, rice, sour cream, pepper, half the cheese and all of the onion mixture. Spread it in the baking dish and scatter the rest of the cheese on top.
- Melt the remaining butter and toss it with the French fried onions. Sprinkle them over the casserole.
- Bake uncovered 20 to 25 minutes, until bubbling at the edges, the topping is golden and the center reaches 165°F. If the topping browns too fast, lay a piece of foil loosely on top.
- Rest 5 minutes, sprinkle with parsley and serve.
Notes
Equipment: 10-inch skillet, small (1 1/2-quart) baking dish, mixing bowl
- Leftover or rotisserie chicken and leftover rice make this a quick weeknight dinner.
- Cooked egg noodles work in place of the rice.
- Mozzarella or provolone can replace the Gruyere for a milder cheese.
- Caramelize the onions slowly; lower heat gives a deeper, sweeter flavor.
- Doneness: The casserole is ready when it bubbles at the edges and the center reaches 165°F on an instant-read thermometer.
- Refrigerate leftovers in a covered container within 2 hours and eat within 3 to 4 days. Reheat until hot in the center (165°F).
- Heat the casserole until the center reaches 165°F, since it is made with cooked chicken and rice.
- Refrigerate cooked rice and chicken within 2 hours of cooking.
- Prep Time: 10 minutes
- Rest Time: 5 minutes
- Cook Time: 50 minutes
- Category: Dinner
- Method: Baked
- Cuisine: American
