Company Chicken Casserole Recipe (Creamy Baked)

Name: Company Chicken Casserole Recipe (Creamy Baked)
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Yield: 4 servings
Ingredients: 4 boneless, skinless chicken breasts; 1 cup chopped onions; 1 cup sliced mushrooms; 2 cloves garlic, minced; 1 can cream of mushroom soup; 1 cup sour cream; 1 cup shredded cheddar cheese; 1 teaspoon dried thyme; Salt and pepper, to taste

calendar_today September 8, 2026 schedule 4 min read

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Prep

15 minutes

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Cook

35 minutes

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Rest

5 minutes

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Servings

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Calories

385 kcal

Tender, seared chicken breasts baked beneath a rich, creamy sauce of mushroom soup and sour cream, finished with a golden layer of melted cheddar cheese. This comforting main dish comes together with mostly pantry staples and tastes far more impressive than the effort it takes to make. It's an ideal choice for dinner parties, holiday gatherings, or a weeknight meal that deserves a little extra care, and it reheats beautifully for easy leftovers.

restaurant_menu Ingredients format_list_numbered Instructions

restaurant_menu Ingredients

Servings

Main Ingredients

check 4 boneless, skinless chicken breasts check 1 cup chopped onions check 1 cup sliced mushrooms check 2 cloves garlic, minced check 1 can cream of mushroom soup check 1 cup sour cream check 1 cup shredded cheddar cheese check 1 teaspoon dried thyme check Salt and pepper, to taste

hardware Essential Tools

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Large skillet

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9x13-inch baking dish

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Mixing bowl

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Whisk

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Aluminum foil

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Meat thermometer

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Wooden spoon or spatula

format_list_numbered Preparation

Preparation

Preheat the oven to 375°F.

Heat olive oil in a large skillet over medium heat and brown the chicken breasts on both sides, about 4 minutes per side, then set aside.

In the same skillet, cook the onions, mushrooms, and garlic until the onions turn translucent, about 5 minutes.

In a separate bowl, whisk together the cream of mushroom soup, sour cream, thyme, salt, and pepper.

Assembly and Baking

Place the browned chicken breasts in a 9x13-inch baking dish and pour the soup mixture over the top.

Spread the sautéed onion and mushroom mixture evenly over the chicken.

Sprinkle the shredded cheddar cheese on top, then cover the dish with aluminum foil.

Bake covered for 25 minutes, then uncover and bake for an additional 10 minutes until the cheese is melted and bubbly. Let rest before serving.

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Try These Variations

Swap the cheese

Mozzarella, Swiss, or Monterey Jack all work beautifully in place of cheddar and each brings a slightly different flavor and melt quality to the finished casserole. Mozzarella gives a milder, stretchier top layer, while Swiss adds a subtle nutty note that pairs nicely with the earthy mushrooms.

Add more vegetables

Diced bell peppers, chopped broccoli, or fresh spinach are all easy additions that boost the nutritional value and add color to the finished dish. Add heartier vegetables like broccoli during the sautéing step so they soften slightly before baking, while spinach can be stirred in raw since it wilts quickly in the oven.

Make it spicy

A sprinkle of crushed red pepper flakes over the top before baking adds a pleasant kick that contrasts nicely with the rich, creamy sauce. Start with a small amount and adjust to taste, since the heat will intensify slightly as the casserole bakes.

Go low-carb

Replace the canned cream of mushroom soup with a homemade cream sauce made from heavy cream, butter, and sautéed mushrooms for a dish that fits keto and low-carb diets. This swap keeps the same rich, creamy texture while cutting out the added starches found in most canned condensed soups.

Chef's Pro Tips

Sear the chicken before baking

Browning the chicken breasts in a hot skillet for about 4 minutes per side builds deep, savory flavor through the Maillard reaction, giving the finished casserole a richer taste than simply baking raw chicken directly in the sauce. This step takes only a few extra minutes but makes a noticeable difference.

Use the fond for extra flavor

Cooking the onions, mushrooms, and garlic in the same skillet used for the chicken pulls all those flavorful browned bits, known as fond, into the vegetables as they cook. This layering technique adds depth to the sauce that you’d otherwise miss by using a clean pan.

Cover the dish for the first half of baking

Keeping the casserole covered with foil for the initial 25 minutes traps steam and keeps the chicken moist while it finishes cooking through completely. Removing the foil only for the final 10 minutes lets the cheese turn golden and bubbly without drying out the chicken underneath.

Let the casserole rest before slicing

Allowing the dish to rest for a few minutes after baking lets the creamy sauce thicken slightly and settle, which makes it much easier to serve clean, intact portions instead of a runny mess straight from the oven.

Storage Guide

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Room Temperature

This casserole contains chicken, dairy, and cream-based sauce, so it should not sit out at room temperature for longer than 2 hours after baking. Cover and refrigerate any leftovers promptly to keep them safe to eat.

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Refrigerator

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat individual portions in a 350°F oven until warmed through, which helps the sauce stay creamy rather than watering out as it sometimes does in the microwave.

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Freezer

This casserole can be frozen either before or after baking, as long as it’s wrapped tightly in aluminum foil or a freezer-safe container to prevent freezer burn. Thaw it overnight in the refrigerator before baking or reheating, and expect the sauce’s texture to be very slightly different once thawed.

Avoid These Mistakes

✕ Skipping the sear on the chicken

Placing raw chicken directly into the baking dish without browning it first results in a paler, less flavorful final dish, since you miss out on the deep savory notes created by searing. Always take the extra few minutes to brown the chicken in a hot skillet first.

✕ Overcrowding the skillet

Adding all the chicken breasts to the skillet at once, especially in a smaller pan, causes the chicken to steam rather than sear, preventing that golden-brown crust from forming. Work in batches if needed to give each piece enough room to properly brown.

✕ Removing the foil too early

Taking the foil off before the initial 25-minute covered baking time is up can dry out the chicken before it has a chance to finish cooking through gently. Stick to the full covered baking time before uncovering the dish to brown the cheese.

✕ Using cold ingredients straight from the fridge

Adding cold sour cream directly to the hot soup mixture can sometimes cause the sauce to look slightly separated or grainy. Let the sour cream sit out for a few minutes to take the chill off before whisking it into the sauce for a smoother result.

nutrition Nutrition Facts

Per serving: 1 chicken breast with sauce

385 kcal Calories

35g Protein

7g Carbs

23g Fat

1.5g Fiber

740mg Sodium

Nutrition values are estimated per serving and will vary based on the exact type of soup, cheese, and sour cream used.

flag Conclusion

Company Chicken Casserole earns its place as a go-to recipe because it delivers real comfort-food flavor with minimal fuss, whether you’re hosting a dinner party or feeding your own family on a Tuesday night. With tender seared chicken, a rich creamy sauce, and a golden layer of melted cheese, it’s a dish that consistently gets requests for the recipe.

Frequently Asked Questions

Can I freeze Company Chicken Casserole? expand_more

Yes, you can freeze it either before or after baking, as long as it's wrapped tightly in aluminum foil or plastic wrap to prevent freezer burn. When you're ready to enjoy it, thaw it overnight in the refrigerator and bake according to the original instructions, adding a few extra minutes if the dish is still cold from the fridge.

How long will the leftovers last? expand_more

Leftovers keep well in an airtight container in the refrigerator for up to 3 days. Reheat individual portions in a 350°F oven until warmed through for the best texture, since oven reheating helps the sauce stay creamy rather than becoming watery the way a microwave reheat sometimes does.

Can I use chicken thighs instead of chicken breasts? expand_more

Absolutely — boneless, skinless chicken thighs work great in this recipe and tend to stay even juicier throughout the baking process thanks to their slightly higher fat content. The searing and baking times stay roughly the same, so no other adjustments to the recipe are needed.

Can I make this casserole ahead of time? expand_more

Yes, you can assemble the entire casserole up to a day in advance and refrigerate it, covered, until you're ready to bake. Since it will be starting from cold, add an extra 10-15 minutes to the covered baking time to make sure the chicken cooks through fully.

What can I add to make this a low-carb meal? expand_more

Swap the canned cream of mushroom soup for a homemade cream sauce made from heavy cream, butter, and sautéed mushrooms, which keeps the dish rich and creamy without the added starches found in most canned soups. This small swap makes the casserole much more keto and low-carb friendly.