Hamdi Saidani Pioneer Woman French Onion Chicken Casserole is an American twist on a French soup classic. This hearty dinner uses rotisserie chicken, caramelized onions, and cremini mushrooms layered with baguette slices and bubbly Gruyere cheese for a rich, oven-baked meal.
Approach A: The first time I made this, I rushed the onions and they stayed pale and crunchy. Now I always give them the full twenty-five minutes because that deep brown color is where all the sweet, savory flavor lives. If you pull them too early, the casserole will taste like raw onions instead of that classic soup base.
This Pioneer Woman French Onion Chicken Casserole is one of those projects that takes a bit of patience but isn’t actually difficult to pull off. The baguettes soak up the beef broth and wine mixture until they’re soft in the middle but still have those chewy, cheesy edges on top. It’s the best thing to make on a cold Sunday when you’ve got time to let the onions do their thing on the stove.
Pioneer Woman French Onion Chicken Casserole Ingredients
For the Onion and Chicken Base:
- 5 tbsp (70g) salted butter
- 1 package (10 oz) cremini mushrooms, thickly sliced
- 5 medium onions, thinly sliced
- 1 tbsp fresh thyme, chopped
- 1/2 tsp kosher salt
- Black pepper, to taste
- 2 tbsp all-purpose flour
- 1/2 cup (120ml) dry white wine
- 3 cups (710ml) low-sodium beef broth
- 2 cups (300g) chopped rotisserie chicken, skin removed
For the Layers:
- 1 long baguette, sliced 1/2 inch (1.25cm) thick
- 2 1/2 cups (280g) shredded Gruyere cheese
- 1/2 cup (50g) grated Parmesan cheese
How To Make Pioneer Woman French Onion Chicken Casserole
- 1. Prep the oven: Set your oven to 220°C (425°F). Take a bit of extra butter and grease a 9-by-13-inch baking dish, making sure you hit the sides so the cheese doesn’t stick.
- 2. Brown the mushrooms: Melt 1 tablespoon of butter in a large pot over medium-high heat. Toss in the mushrooms and leave them alone for 2 minutes so they get a dark crust on the bottom before you stir them.
Leaving them undisturbed lets the water evaporate so they brown rather than steam. Once they’re dark and flavorful, move them to a plate for later.
- 3. Caramelize the onions: Add the rest of the butter to the same pot and turn the heat down to medium-low. Cook the onions for about 25 minutes, stirring often, until they’re soft and a deep golden brown.
- 4. Build the sauce: Stir the mushrooms back in along with the thyme, salt, and pepper. Sprinkle the flour over everything and cook for 1 minute while stirring to get rid of the floury taste.
- 5. Simmer the liquid: Crank the heat up a bit and pour in the wine to scrape the brown bits off the bottom. Add the beef broth and chicken, let it come to a simmer, and stir for 3 minutes until the liquid looks thick and glossy.
- 6. Start the layers: Ladle just enough of the chicken mixture into your dish to cover the bottom. Lay half of your baguette slices on top in a single layer to create a solid base.
- 7. Add the middle layer: Pour half of the remaining onion mixture over the bread. Use the back of your ladle to press the slices down so they start drinking up the broth, then sprinkle with 1 cup of Gruyere and half the Parmesan.
- 8. Finish the top: Repeat with the rest of the bread and the remaining chicken mixture. Cover the top with the last of the Gruyere and Parmesan so every inch of bread is hidden under cheese.
- 9. Bake the casserole: Cover the dish with foil, tenting it slightly so the cheese won’t stick to the metal. Place it on a baking sheet to catch drips and bake for 20 minutes.
- 10. Brown the crust: Remove the foil and bake for another 15 minutes until the cheese is brown and bubbly. Let the dish sit on the counter for 10 minutes before you cut into it so the sauce sets up.
Recipe Tips
- Choose a sturdy baguette: Look for a loaf with a very hard, crusty exterior rather than a soft French bread. A tougher crust holds its shape better when it’s sitting in beef broth so the whole dish doesn’t turn into a puddle.
- Don’t skimp on the wine: Use a dry white like Pinot Grigio or Sauvignon Blanc to balance the heavy beef broth and sweet onions. If you want to skip the alcohol, you can use a splash of apple cider vinegar mixed with more broth instead.
- Toast the bread first: If you like a bit more texture, put the baguette slices on a tray in the oven for five minutes before layering them. This creates a barrier that keeps the bread from getting too soggy too fast.
- Use low-sodium broth only: Between the salted butter, the rotisserie chicken, and the Parmesan, there’s a lot of salt in this dish. Using low-sodium beef broth gives you control so the final result isn’t overwhelming.
- Keep the onions moving: When caramelizing, make sure you’re using a wooden spoon to move the onions from the bottom of the pot. If they sit too long on medium-low, they can burn in spots, which makes the whole sauce taste bitter.
What To Serve With Pioneer Woman French Onion Chicken Casserole
A crisp arugula salad with a lemon dressing is the best partner for this. The peppery greens work well with the heavy cheese and sweet onions.
You could also serve some simple roasted green beans or asparagus on the side. Since the casserole already has plenty of bread, you don’t need any extra rolls or grains with this meal.
How To Store Pioneer Woman French Onion Chicken Casserole
- Fridge: Wrap the dish tightly or move leftovers to an airtight container for up to 3 days. The bread will get much softer as it sits in the fridge, so it won’t be as crusty the second time around.
- Reheat: Use the oven at 175°C (350°F) to get the cheese bubbly again and help the bread regain some structure. The microwave is faster, but it tends to make the baguette slices quite chewy and tough.
- Freeze: This dish doesn’t freeze well because the bread turns to mush when it thaws. If you need to prep ahead, make the onion and chicken mixture and freeze that alone, then add the bread and cheese when you’re ready to bake.
Pioneer Woman French Onion Chicken Casserole Nutrition Facts
Per serving (1 of 8):
- Calories: 540 kcal
- Protein: 32g
- Fat: 28g
- Carbohydrates: 38g
- Sugar: 6g
- Sodium: 1150mg
FAQs
Can I use chicken breasts instead of rotisserie chicken in my Pioneer Woman French Onion Chicken Casserole?
Yes, you can use poached or pan-seared chicken breasts, just make sure they’re seasoned well before you add them. You’ll need about two large breasts to get the 2 cups of meat required for the casserole.
What’s the best substitute for Gruyere?
If you can’t find Gruyere, Swiss cheese or Fontina are the best swaps because they melt smoothly and have a similar nutty flavor. You could also use a sharp Provolone if you want something a bit milder.
How do I keep the bread from getting soggy in Pioneer Woman French Onion Chicken Casserole?
The trick is to use day-old bread or toast the slices until they’re very dry before you layer them. This prevents them from collapsing completely when the beef broth hits them.
Is the wine necessary for the flavor?
The wine adds an acidic touch that cuts through the richness of the beef and cheese, but you can leave it out. Just replace that half-cup of wine with more beef broth and a teaspoon of lemon juice.
Can I use red onions instead of white in my Pioneer Woman French Onion Chicken Casserole?
No, it’s best to stick with yellow or white onions for this specific dish. Red onions have a different sugar content and turn a strange grey color when caramelized for a long time in beef broth.
Try More Pioneer Woman Recipes:
- Pioneer Woman Green Chile Chicken Enchilada Casserole
- Pioneer Woman Chicken Cordon Bleu Casserole
- Pioneer Woman Chicken Dorito Casserole
- Pioneer Woman King Ranch Chicken Casserole
- Pioneer Woman Chicken Tortilla Casserole
Pioneer Woman French Onion Chicken Casserole
Description
The Pioneer Woman’s French Onion Chicken Casserole is a decadent, brilliant mashup of classic French onion soup and a hearty weeknight bake. By slowly caramelizing onions and tossing them with earthy cremini mushrooms, shredded rotisserie chicken, and a rich beef and white wine broth, you get an incredibly savory base. Layered with crusty baguette slices and smothered in bubbling, golden Gruyere and Parmesan, this bubbling 9×13 dish is the ultimate cold-weather crowd-pleaser.
Ingredients
For the Onion and Chicken Base:
For the Layers:
Instructions
- Prep the oven: Set your oven to 220°C (425°F). Take a bit of extra butter and grease a 9-by-13-inch baking dish, making sure you hit the sides so the cheese doesn’t stick.
- Brown the mushrooms: Melt 1 tablespoon of butter in a large pot over medium-high heat. Toss in the mushrooms and leave them alone for 2 minutes so they get a dark crust on the bottom before you stir them.
- Caramelize the onions: Add the rest of the butter to the same pot and turn the heat down to medium-low. Cook the onions for about 25 minutes, stirring often, until they’re soft and a deep golden brown.
- Build the sauce: Stir the mushrooms back in along with the thyme, salt, and pepper. Sprinkle the flour over everything and cook for 1 minute while stirring to get rid of the floury taste.
- Simmer the liquid: Crank the heat up a bit and pour in the wine to scrape the brown bits off the bottom. Add the beef broth and chicken, let it come to a simmer, and stir for 3 minutes until the liquid looks thick and glossy.
- Start the layers: Ladle just enough of the chicken mixture into your dish to cover the bottom. Lay half of your baguette slices on top in a single layer to create a solid base.
- Add the middle layer: Pour half of the remaining onion mixture over the bread. Use the back of your ladle to press the slices down so they start drinking up the broth, then sprinkle with 1 cup of Gruyere and half the Parmesan.
- Finish the top: Repeat with the rest of the bread and the remaining chicken mixture. Cover the top with the last of the Gruyere and Parmesan so every inch of bread is hidden under cheese.
- Bake the casserole: Cover the dish with foil, tenting it slightly so the cheese won’t stick to the metal. Place it on a baking sheet to catch drips and bake for 20 minutes.
- Brown the crust: Remove the foil and bake for another 15 minutes until the cheese is brown and bubbly. Let the dish sit on the counter for 10 minutes before you cut into it so the sauce sets up.
Leaving them undisturbed lets the water evaporate so they brown rather than steam. Once they’re dark and flavorful, move them to a plate for later.
Notes
-
Choose a sturdy baguette: Look for a loaf with a very hard, crusty exterior rather than a soft French bread. A tougher crust holds its shape better when it’s sitting in beef broth so the whole dish doesn’t turn into a puddle.
Don’t skimp on the wine: Use a dry white like Pinot Grigio or Sauvignon Blanc to balance the heavy beef broth and sweet onions. If you want to skip the alcohol, you can use a splash of apple cider vinegar mixed with more broth instead.
Toast the bread first: If you like a bit more texture, put the baguette slices on a tray in the oven for five minutes before layering them. This creates a barrier that keeps the bread from getting too soggy too fast.
Use low-sodium broth only: Between the salted butter, the rotisserie chicken, and the Parmesan, there’s a lot of salt in this dish. Using low-sodium beef broth gives you control so the final result isn’t overwhelming.
Keep the onions moving: When caramelizing, make sure you’re using a wooden spoon to move the onions from the bottom of the pot. If they sit too long on medium-low, they can burn in spots, which makes the whole sauce taste bitter.
