French Onion Chicken Casserole – This French onion chicken casserole makes a delicious and satisfying everyday meal for busy families. Juicy, succulent chicken breasts are topped with caramelized onions and glorious melted cheese. Serve with steamed vegetables or a light salad, and this well-seasoned chicken casserole recipe is a big family favorite! This easy go-to meal is also Low Carb and Keto-friendly. Enjoy!
Do you love Chicken Casserole? Here are a few of our favorite recipes from the website! Try our delicious Creamy Chicken and Cauliflower Casserole or our easy Mediterranean Chicken Zucchini.
Photo credit: © Eatwell101.com
Ingredients list for the French Onion Chicken Casserole
- 3 boneless, skinless chicken breasts (cut horizontally if they’re too thick)
- 1 or 2 teaspoons garlic powder
- 1 teaspoon dried oregano
- Red crushed chili pepper flakes, optional
- Pinch of salt and fresh cracked pepper
- 1 cup shredded mozzarella cheese (or Gruyere)
- 2 tablespoons unsalted butter
- 5 large onions, thinly sliced
- 3 cloves garlic, minced
- 1/4 to 1/2 cup chicken broth
- Fresh chopped parsley, for garnish
Photo credit: © Eatwell101.com
How to make the French Onion Chicken Casserole
- Caramelize onions: Melt butter, cook onions with salt and pepper until golden, and deglaze with broth if needed. Stir in garlic and set aside.
- Prep chicken – Season chicken breasts with oregano, chili flakes, salt, pepper, and garlic powder. Arrange in a greased baking dish, then top with caramelized onions.
- Bake & serve – Sprinkle cheese over chicken, bake until cooked through and bubbly, then broil to crisp the cheese. Garnish with parsley and serve hot.
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Tips for the French Onion Chicken Casserole recipe
- You can prepare the caramelized onion ahead of time, and just assemble the chicken casserole at the last minute before baking.
- You can flavor up the French onion with a dash of white wine, sherry, or balsamic vinegar to deglaze the pan.
- Cooking time depends on the thickness of your chicken breasts. Cut them horizontally if they are too thick. You can also pound the chicken breasts (gently!) to get them to an even thickness.
- Go easy on the salt because French onion and cheese are already salty. The taste of the French onion chicken casserole would be overpowered by saltiness.
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Photo credit: © Eatwell101.com
Directions
1. To make the French onion chicken casserole: Preheat your oven to 400°F (200°C). Lightly grease a 9×12-inch baking dish and set aside.
2. Melt butter in a large skillet over medium-high heat. Add onions and season with salt and pepper. Cook for 5-8 minutes until soft.
3. Reduce heat to medium and cook, stirring occasionally, until onions are caramelized – about 15 minutes. Pour in 1/4 cup of broth to deglaze if your pan gets too dry, and keep stirring until onions are browned.
4. Stir in fresh minced garlic and cook until fragrant, about 1 minute. Turn off the heat and allow to cool slightly.
5. Season chicken breasts with oregano, crushed chili pepper flakes, salt, pepper, and garlic powder. Go easy on the salt, since French onion and cheese are already salty. Arrange chicken breasts in the baking dish.
6. Divide caramelized onions on top of each chicken breast. Sprinkle shredded cheese on top and bake for 20-25 minutes (or longer, depending on the thickness of your chicken breasts), until the chicken is fully cooked and the cheese is bubbly. Then broil for 2 minutes to crisp up the cheese. Garnish the French onion chicken casserole with fresh chopped parsley and serve immediately with steamed vegetables or cauliflower rice. Enjoy!
Photo credit: © Eatwell101.com
More chicken casserole recipes
- Fajita Chicken Casserole
- Spinach Chicken Casserole with Cream Cheese and Mozzarella
- Jalapeño Popper Chicken Casserole
- Broccoli Chicken Casserole with Cream Cheese and Mozzarella
Photo credit: © Eatwell101.com
Reviews (17)
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Kay Oxford
2023-05-30 10:13:29
Cut down on the onions, 1 average onion 11.3 carbs, I shutter to think what FIVE LARGE onions are! Doesn't say servings, but if three, this puts me over my daily limit (I control my diabetes with Keto. This is NOT low carb or Keto as is!!!
Amilla
2023-03-11 20:04:09
Made for myself with two chicken breasts, one cut in half lengthwise. One large onion was plenty for the three servings. (The recipe made dinner for me for 3 nights.). I topped with shredded mozzarella mixed with shredded Parmesan. The cheese was added at the beginning, and it was perfect at the end when I broiled it for a couple of minutes. I love the idea of adding a bit of balsamic or soy sauce to the onions for an additional layer of flavor.
Glennie
2022-10-03 17:00:51
Delicious if you aren’t a beginner cook! Even Gordon Ramsay couldn’t caramelize onions in 15 minutes so if you don’t all ready know how - do a Google or YouTube search. I knew it was WAY too much onion for the recipe but made the amount called for because I knew I’d use the excess onions for other dishes. Deglaze your onion pan with balsamic vinegar for added flavor and as others have said, don’t add the cheese until later in the baking process. I used Gruyere and doubled the garlic because recipes never call for enough.
Sara
2022-03-08 21:47:12
This was very tasty. Definitely reminded me of French Onion soup. My only change was I increased the portions of spices on the chicken rub.
Chuck
2021-11-17 19:14:20
This is way too many onions. I used 3 and it was too much. The chicken was rather bland. I'd like to try Gruyere as well.
