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Best Easy French Onion Chicken Casserole Recipe

Name: Best Easy French Onion Chicken Casserole Recipe
Total time: 55 min
Yield: 250 g
Ingredients: Boneless skinless chicken breasts 2 lbs; Yellow onions 3 pieces; Swiss cheese, sliced 8 slices; Baguette or French bread (for topping) 6 slices; Butter 3 tbsp; Chicken broth 1.5 cups; Olive oil 2 tbsp; Salt 1 tsp; Black pepper 0.5 tsp; Dried thyme 0.5 tsp; Garlic powder 1 tsp

French onion chicken casserole bakes tender chicken in a rich onion soup gravy topped with melted Swiss cheese. This high protein, family-friendly chicken dish combines two comfort food classics in one delicious bake.

Cook 55 min Difficulty NORMAL 330 kcal

#high protein #family friendly #comfort food #oven baked

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Ingredients

Main ingredients

Boneless skinless chicken breasts 2 lbs
Yellow onions 3 pieces
Swiss cheese, sliced 8 slices
Baguette or French bread (for topping) 6 slices
Butter 3 tbsp
Chicken broth 1.5 cups

Seasonings/Sauce

Olive oil 2 tbsp
Salt 1 tsp
Black pepper 0.5 tsp
Dried thyme 0.5 tsp
Garlic powder 1 tsp

Nutrition summary

Carbohydrates 15 g 18%

Protein 34 g 41%

Fat 13 g 41%

Serving size 250g

Cooking steps

1

Preheat oven to 375°F (190°C) and lightly grease a 9x13-inch casserole dish with olive oil.
2

Thinly slice the onions. In a large skillet over medium heat, melt butter and 1 tbsp olive oil, then add onions with a pinch of salt. Cook, stirring often, for 20–25 minutes until onions are deeply caramelized but not burnt.
3

While onions cook, season both sides of chicken breasts with salt, black pepper, garlic powder, and dried thyme.
4

Once onions are caramelized, add chicken broth to the pan. Bring to a simmer and scrape up all the browned bits; simmer for 2–3 minutes to create a rich gravy.
5

Transfer chicken breasts to the prepared casserole dish. Spread caramelized onion mixture evenly over the chicken, then ladle the pan gravy over all.
6

Top chicken with Swiss cheese slices, then arrange baguette slices on top. Mist or brush bread lightly with olive oil.
7

Bake uncovered for 25–30 minutes until chicken is cooked through (internal temp reaches 165°F), cheese is melted, and bread is golden. For extra crispy bread, broil for the last 2 minutes, watching closely.
8

Let rest 5 minutes before serving to allow juices to settle.

Personalized Q&A

Q. What ingredient provides the main flavor in this casserole?

The deeply caramelized yellow onions are the star of this recipe, bringing that classic French onion soup flavor. Combined with rich chicken broth and melted Swiss cheese, they define the dish’s comforting aroma and savory taste.

Q. What’s important for perfect onions in this recipe?

Cook the sliced onions low and slow in butter and olive oil for 20–25 minutes, stirring frequently. This careful heat management develops deep sweetness and color without burning, creating the foundation of the casserole’s flavor.

Q. How do I keep the chicken moist in the oven?

Baking the chicken covered in onion gravy and topped with cheese helps lock in moisture. Avoid overbaking—remove from the oven as soon as chicken reaches 165°F (about 25–30 minutes) to prevent dryness.

Q. What’s the protein to carb ratio of this dish?

Each serving contains 34g protein and 15g carbohydrates, with protein and carbs each providing 41% and 18% of the total calories, respectively. This makes it a high-protein, moderate-carb casserole.

Q. How many calories are in one serving of French onion chicken casserole?

Each 250g serving of this casserole has about 330 kcal, making it a hearty but family-friendly main dish.

Best Easy French Onion Chicken Casserole Recipe

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