French Onion Chicken Bake

Ingredients

• 5boneless, skinless chicken breasts
• 1 mediumyellow onion, sliced
• 1 tbsp (15 ml)salted butter
• 296 ml (1¼ cups)fat-free beef broth
• 1½ tsp (7.5 ml)Worcestershire sauce
• 1 tsp (5 ml)dried thyme
• ½ tsp (2.5 ml)garlic powder
• ½ tsp (2.5 ml)salt
• ½ tsp (2.5 ml)black pepper
• ½ tsp (2.5 ml)onion powder
• ½ tsp (2.5 ml)paprika
• 12 slicesprovolone cheese

Instructions

1. 1

   Heat the oven

   Preheat the oven to 177°C (350°F).

2. 2

   Soften the onion

   Slice the onion and sauté it in a frying pan with the butter until translucent and lightly browned. Transfer it to a bowl and set aside.

3. 3

   Season the chicken

   Mix the salt, pepper, paprika, garlic powder and onion powder in a small bowl. Season both sides of all five chicken breasts, then place them in a greased frying pan. Fry lightly for about 5 minutes, turn, and cook the other side.

4. 4

   Layer the dish

   Spray a casserole dish with cooking spray and spread the cooked onions over its base. Sprinkle with the dried thyme, then arrange the chicken breasts on top.

5. 5

   Bake the chicken

   Mix the beef broth with the Worcestershire sauce and pour it over the chicken and onions. Cover the dish and bake for about 35–40 minutes.

6. 6

   Melt the cheese

   When the chicken is cooked, remove the dish from the oven and cover the chicken with the provolone. Return it to the oven uncovered for another 5–10 minutes. Check that the chicken reaches an internal temperature of 74°C (165°F).

What is French onion chicken bake?

This American casserole takes inspiration from French onion soup, with savoury onions and broth beneath chicken and melted cheese. Rather than serving the onions as a soup, the recipe bakes them together with chicken breasts for a hearty main.

The combination works because the onions soften in butter first, while thyme and Worcestershire add savoury depth to the cooking liquid. Provolone gives the finished dish a smooth, cheesy top.

Nutrition and macros by portion

The nutrition label shows one serving as written: 339 calories, 0g protein, 0g carbs, 0g fat.

The chicken supplies most of the protein, while the onion and seasonings contribute a small amount of carbohydrate. Butter and provolone provide much of the fat; serve a portion with plenty of non-starchy vegetables to balance the plate.

Build flavour with the onions

Onions first: sauté them until translucent and lightly browned, as directed. This softens their texture and gives them a more rounded flavour before they go into the casserole.

Butter matters: the salted butter helps the onion cook and contributes seasoning. Keep the heat moderate so the slices soften without catching in the pan.

Season and brown the chicken

Even coating: mix the dry seasonings before applying them, then cover both sides of each breast. This helps distribute the garlic, onion, pepper and paprika across the chicken.

Light frying: the recipe briefly fries the seasoned chicken before baking. Avoid treating this stage as a substitute for checking doneness; use the internal temperature at the end.

Keep the chicken moist

Covered baking: the broth and Worcestershire mixture surrounds the chicken as it cooks, while covering the casserole holds in moisture. Keep the dish covered for the stated 35–40 minutes, then uncover it only to melt the cheese.

Doneness cue: check the thickest part of a breast with a food thermometer. The recipe specifies 74°C (165°F), so allow extra oven time if it has not reached that temperature.

Choose the right cheese

Provolone: its mild, savoury flavour sits well with the onion and broth. Add the slices after the chicken is cooked, then return the dish uncovered for 5–10 minutes so the cheese melts.

Coverage: arrange the 12 slices over the chicken rather than burying the dish in cheese. If the pieces vary in size, place them to cover the breasts as evenly as possible.

What to serve alongside

Vegetables: serve with green beans, broccoli or a crisp salad to bring freshness to the rich, savoury casserole. These sides also add colour and texture to the plate.

Something to catch the juices: potatoes or rice make a filling accompaniment and work well with the onion-and-broth sauce. For a lighter meal, serve a smaller portion of either alongside extra vegetables.

Recipe notes & tips

• Slice the onion evenly so the pieces soften at a similar rate.
• Grease the frying pan before adding the chicken, as specified in the method.
• Use a casserole dish that holds the chicken in a single layer.
• Pour the broth mixture evenly over the chicken and onion layer.
• Check the temperature in the thickest part of a breast without touching the dish.
• Check that the beef broth and Worcestershire sauce are labelled gluten-free if needed.

Variations

• Use another melting cheese: swap provolone for mozzarella or Swiss-style cheese.
• Add mushrooms: sauté sliced mushrooms with the onion before layering them in the casserole.
• Bring extra herbs: add a little dried rosemary alongside the thyme.
• Serve over potatoes: spoon the chicken and cooking juices over mashed or roasted potatoes.
• Add greens: serve with steamed green beans or broccoli for a fresh contrast.

Common mistakes to avoid

• Over-browning the onion: cook it until lightly browned and translucent, not dark or burnt.
• Uneven seasoning: mix the spices thoroughly and coat both sides of every breast.
• Crowding the frying pan: cook the chicken in batches if the breasts do not fit comfortably.
• Skipping the temperature check: use a thermometer and confirm the thickest part reaches 74°C (165°F).
• Adding cheese too early: wait until after the covered bake, then melt it uncovered for 5–10 minutes.

How to store

Refrigerate leftovers in a sealed container within 2 hours and use within 3–4 days. Reheat until steaming hot throughout, in the oven covered or in the microwave; add a little broth if the dish seems dry.

Frequently asked questions