Herbed Chicken Casserole Recipe

Herbed chicken casserole is an oven-baked dish made with tender chicken, vegetables, and a flavorful thyme sauce, topped with creamy mashed potatoes. This meal combines savory, aromatic flavors with a golden potato crust, making it perfect for chilly days or cozy family dinners. You can use boneless skinless chicken thighs, chicken breast fillets, or even leftover roasted chicken. The butter, milk, egg yolks, and cheese in the potato topping bake to a lightly golden finish that is both satisfying and visually inviting.

How to Make Herbed Chicken Casserole

Start by preparing the mashed potatoes. Boil and mash them with butter, milk, and salt. Let them cool before stirring in the egg yolks. This prevents the eggs from cooking and makes the mash smooth and creamy.

Next, cook the chicken in simmering chicken broth until tender. Remove it from the liquid, then shred or chop it into bite-sized pieces.

While the chicken cooks, sauté the diced carrots, shallots, celery, and garlic in butter and olive oil. Pour in the white wine and let it bubble for a couple of minutes. Then add the crushed tomatoes, olives, chicken broth, thyme, salt, and pepper. Let the sauce simmer until it thickens slightly. Finally, fold the shredded chicken into the sauce and let it heat through for a few minutes.

Assemble the casserole in an ovenproof dish. Spread or pipe the potato topping evenly over the chicken mixture. Sprinkle grated Parmesan or Emmental on top. Bake at 200°C (390°F) for 15–20 minutes until the potatoes turn lightly golden.

Serving Tips and Variations

Serve the casserole with a simple green salad, like this Easy Side Salad, for a fresh and vibrant contrast. A warm, crusty bread pairs beautifully; try my No-Knead Dutch Oven Bread for a rustic, homemade touch.

You can vary the herbs in the sauce to change the flavor profile. Rosemary or sage works wonderfully, adding a cozy, aromatic note. For a slightly more French twist, use a mix of Provençal herbs to give the dish a new, fragrant dimension.

This casserole reheats beautifully and works well with leftover chicken. Preparing the mashed potatoes ahead of time makes the assembly quick and easy, perfect for busy weeknights or a relaxed Sunday dinner.

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Herbed Chicken Casserole With Golden Potato Topping

This herbed chicken casserole pairs tender shredded chicken and vegetables in a light thyme sauce with a creamy mashed-potato and cheese topping. The potatoes are enriched with butter, milk, and egg yolks, and finished with grated Parmesan or Emmental, resulting in a beautifully golden crust when baked in the oven. It’s a hearty dish, like a blend of chicken stew and cottage pie. Perfect for chilly days and easy family meals.

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Prep Time 45 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 30 minutes mins

Course Main Course

Cuisine European, Finnish, French

Servings 6 people

Ingredients

  

For the Chicken Filling

• 500 g chicken thighs, boneless, skinless or chicken breast fillets
• 6 dl (2 ½ cups) chicken broth, divided
• 1 dl (½ cup) dry white wine or apple juice, or 1 tbsp white wine vinegar + and a splash of water
• 1 tbsp butter
• 1 tbsp olive oil
• 4 carrots diced
• 2 celery stalks sliced thinly
• 2-3 shallots diced
• 3 garlic cloves minced
• 200 g crushed tomatoes or diced fresh tomatoes
• 100 g black olives pitted and halved
• 2 tsp dried thyme
• Black pepper to taste
• Salt to taste

For the Potato Topping

• 700 g floury potatoes
• 2 tsp salt for cooking the potatoes
• 1.5 dl (⅔ cup) milk
• 30 g butter
• 2 egg yolks
• Grated Parmesan or Emmental cheese for topping

Instructions

 

Start with the potato mash

• Peel and chop the potatoes. Cook them in salted water until tender. Drain well.
• Heat the milk.
• Mash the potatoes and add butter and hot milk.
• Let the mash cool to room temperature, then mix in the egg yolks. Set aside.

Cook the chicken

• Place the chicken thighs in a pot and cover with 4 – 6 dl of the chicken broth. Simmer until the chicken is cooked through, about 15–20 minutes.
• Remove the chicken from the liquid and let it cool slightly. Shred or chop into bite-sized pieces. Reserve the cooking broth.

Prepare the vegetable base

• Heat butter and olive oil in a large pan. Sauté the diced carrots, celery, and shallots until softened. Add the garlic and cook for another minute.

Deglaze and build the sauce

• Pour in the white wine and let it simmer for a couple of minutes.
• Add the crushed tomatoes, olives, 3 – 4 dl of the remaining broth, thyme, black pepper, and salt.
• Let the sauce simmer gently for about 10 minutes, until slightly thickened.
• Stir the shredded chicken into the sauce and let it simmer for another 5 minutes. Add a splash of broth if it becomes too thick.

Assemble the casserole

• Transfer the chicken mixture into an ovenproof dish.
• Spoon or pipe the potato mash on top.
• Finish with a light scattering of grated Parmesan or Emmental.

Bake

• Bake at 200°C (390°F) for 15–20 minutes, or until the potato topping is lightly golden.

Notes

You can use boneless, skinless chicken thighs as written, or substitute chicken breast fillets if you prefer.
• Leftover roasted chicken also works wonderfully and makes the recipe even quicker.
• You can prepare the mash earlier in the day; keep it covered until needed.
• Add herbs like rosemary or parsley for variation.
• Substitute the white wine with additional chicken broth if preferred.
• This dish reheats well and makes excellent leftovers.

Keyword chicken cottage pie, chicken potato bake, chicken potato casserole, Chicken with herbs, comfort food chicken, Finnish-style chicken bake, herbed chicken casserole, oven-baked chicken casserole, shredded chicken recipe