Name: Creamy Chicken Portobello Mushroom Casserole Recipe
Prep time: 20 min
Cook time: 40 min
Total time: 1 h
Yield: 4
Cuisine: American
Ingredients: 1 12-oz. package extra-wide egg noodles; 2 T. extra virgin olive oil, divided; 1 T. unsalted butter; 1 medium red onion, diced; 2 t. garlic powder, divided; Sea salt and black pepper, to taste; 4 oz. Portobello mushrooms, chopped; 4 oz. cream cheese, room temperature; 1 10.5-oz. can cream of mushroom condensed soup (or 1½ c. homemade soup); ½ c chicken broth – only if using canned cream of mushroom soup; ½ c. sour cream; 1 t. dried thyme; 12 oz. shredded, cooked chicken

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If you’re on the lookout for a comforting dish that combines rich flavors with hearty ingredients, look no further than this Creamy Chicken Portobello Mushroom Casserole. Bursting with tender chicken, earthy portobello mushrooms, and a luscious creamy sauce, this casserole is not just a meal—it’s an experience.

Perfect for family dinners or a cozy night in, it’s easy to prepare and sure to impress your guests. Join us as we guide you through each step of making this delightful dish, guaranteed to become a staple in your cooking repertoire.

Why You’ll Love This Recipe

Savory Flavors: The combination of tender chicken and umami-rich portobello mushrooms creates a mouthwatering flavor profile that is both comforting and satisfying.
Creamy Delight: The luscious creamy sauce ties all the ingredients together, adding a luxurious texture that makes each bite irresistible.
Easy Preparation: With simple steps and straightforward ingredients, this casserole is quick to prepare, making it an ideal choice for busy weeknights.
Versatile Meal: Perfect for any occasion, whether a family gathering or a casual dinner, this dish is sure to impress and can easily be adapted to suit various dietary preferences.

What are Portobello Mushrooms?

Portobello mushrooms, scientifically known as Agaricus bisporus, are mature cremini mushrooms that are recognized for their large size and meaty texture. Characterized by their deep brown caps, which can grow up to six inches in diameter, portobellos are commonly used as a hearty substitute for meat in various dishes due to their robust flavour and satisfying chew. Their versatility makes them a popular choice in vegetarian and vegan recipes, where they can be grilled, baked, or sautéed to enhance the overall taste of the meal.

Ingredients

Extra-wide egg noodles: These hearty noodles provide a perfect base for the casserole, absorbing the creamy sauce beautifully while giving a satisfying bite. Look for brands that offer a good balance of thickness and texture for optimal results.
Extra virgin olive oil: Known for its robust flavour and health benefits, extra virgin olive oil adds a rich taste to your dish. It is ideal for sautéing your onions and mushrooms, enhancing both the aroma and the complexity of the dish.
Unsalted butter: Using unsalted butter allows you to control the saltiness of your casserole, ensuring that the natural flavours of the ingredients shine through. Plus, it adds a luxurious creaminess that contributes to the overall texture.
Medium red onion: These onions provide a sweet and mild taste that complements the savoury chicken and mushrooms perfectly. Choose onions that are firm and have vibrant skins for the best flavour.
Garlic powder: Garlic powder is a convenient way to infuse your dish with rich garlicky goodness without the hassle of peeling and chopping. Opt for high-quality garlic powder for a more potent flavour that elevates the entire recipe.
Sea salt and black pepper: Essential for seasoning, sea salt enhances the natural flavours of your ingredients, while freshly cracked black pepper adds a kick of spice. A good balance of these seasonings will elevate your casserole to new heights.
Portobello mushrooms: As discussed earlier, these mushrooms offer a deep, earthy flavour and a meaty texture that will make your casserole hearty and satisfying. Look for firm caps with an even colour for the best quality.
Cream cheese: This ingredient adds a rich creaminess to the casserole, melding beautifully with the other ingredients to create an irresistible creamy sauce. Choose a full-fat variety for the best results.
Cream of mushroom condensed soup (or homemade soup): This pantry staple adds depth and creaminess to your dish with minimal effort. If opting for canned, select a brand with natural ingredients for a homemade taste; alternatively, prepare your own for a fresh, wholesome option.
Chicken broth: If you’re using canned cream of mushroom soup, chicken broth can be added to achieve your desired consistency; it enhances the overall savoury flavour. Choose low-sodium broth to better control the seasoning of your dish.
Sour cream: This tangy ingredient contributes a lovely creaminess and slight acidity that balance the casserole’s richness. Full-fat sour cream provides the best texture and flavour.
Dried thyme: A classic herb, dried thyme imparts a warm, earthy note to the casserole. It pairs beautifully with chicken and mushrooms, so be sure to have this key ingredient on hand.
Shredded, cooked chicken: For the best results, use tender shredded chicken, as it melds seamlessly with the other ingredients. For convenience, you can easily use leftover roasted chicken or a rotisserie chicken.
Frozen peas: These peas add a pop of colour and a hint of sweetness to the casserole. They’re both convenient and nutritious, adding visual appeal to the final dish.
Parmesan cheese: A sprinkle of freshly grated Parmesan cheese on top of your casserole adds a savoury, nutty finish that elevates the dish. Choose a high-quality cheese for the best results, and consider grating it just before use for optimal flavour.
Fresh parsley: Use freshly chopped parsley as a garnish to brighten up your dish and add a touch of colour. Its mild, fresh flavour complements the rich casserole perfectly.

Substitutions and Additions

Extra-wide egg noodles: For a gluten-free option, substitute with gluten-free pasta or zucchini noodles. Rice can also work well for a different texture.
Extra virgin olive oil: Can be replaced with avocado oil or unsalted butter for a richer flavour, though this may alter the final taste slightly.
Unsalted butter: Coconut oil or vegan butter can serve as dairy-free alternatives without compromising the dish’s creaminess.
Medium red onion: Yellow onions or shallots can be used for a slightly different flavour profile. Leeks also provide a milder, unique taste.
Garlic powder: Fresh garlic cloves can offer a more intense flavour—use about two cloves for every teaspoon of garlic powder.
Sea salt and black pepper: Consider using smoked salt for an added depth of flavour, or seasoning blends like Italian herbs for an extra burst of taste.
Portobello mushrooms: Cremini or shiitake mushrooms can be substituted, though portobellos provide a distinct texture and flavour that may be desired.
Cream cheese: Greek yogurt or a dairy-free cream cheese alternative can be a lighter option while still maintaining creaminess.
Cream of mushroom condensed soup: Homemade mushroom sauce can replace store-bought varieties, allowing control over ingredients and flavour.
Chicken broth: Vegetable broth can be a great substitute for a vegetarian version, while homemade broth adds a healthful touch.
Sour cream: Greek yogurt can be used as a healthier substitute, imparting a similar tanginess without the added fat.
Dried thyme: Fresh thyme or rosemary can be added for a fragrant herbal note if available.
Shredded, cooked chicken: Substitute chickpeas or lentils for a vegetarian version. Cooked tofu can also add protein while keeping the dish hearty.
Frozen peas: Fresh peas or green beans can be incorporated for freshness, or you can add other veggies like corn or diced bell peppers for additional colour and nutrition.
Parmesan cheese: Nutritional yeast can offer a cheesy flavour while being a dairy-free option, or use a vegan cheese alternative for a similar effect.
Fresh parsley: Fresh chives or basil can be used as an alternative garnish, adding their unique flavours to the finished casserole.

Instructions

Prepare egg noodles following the package instructions. After draining, mix the noodles with two or three tablespoons of cream of mushroom soup to prevent them from sticking. Set aside.
As the water for the noodles boils, position the top oven rack in the center and preheat the oven to 400°F. Lightly grease a 4-quart casserole dish and set it aside.
Heat one tablespoon of olive oil and one tablespoon of unsalted butter in a large skillet over medium heat. Add the red onion and one teaspoon of garlic powder, seasoning with salt and black pepper to taste. Stir to combine and sauté, stirring occasionally, for 3-4 minutes until the onion begins to soften.

Add the mushrooms and the remaining butter to the skillet. Season lightly with additional salt and black pepper, if desired. Sauté, stirring occasionally, for 5-7 minutes until the mushrooms are beautifully browned.

Take the skillet off the heat and blend in the softened cream cheese until fully incorporated. Set it aside.
In a medium mixing bowl, blend the cream of mushroom soup, chicken broth (if using canned soup), sour cream, and the remaining garlic powder and thyme. Pour this mixture into the skillet and stir until well combined.

Add the shredded chicken, frozen peas, and cooked noodles to the skillet. Season with salt and black pepper to taste, and gently toss to combine. Note: If your skillet isn’t large enough to hold all the ingredients, use a large mixing bowl instead.

Spoon the mixture into the prepared casserole dish and sprinkle with freshly grated Parmesan cheese. Cover with a lid or aluminum foil and place it in the preheated oven.

Bake the casserole for 20 minutes, then carefully uncover it by removing the lid or foil. Continue baking for an additional 5-10 minutes, or until the top is beautifully browned. Take it out of the oven and garnish with freshly chopped parsley just before serving.

Recipe Tips

Time-saving: Use pre-cooked rotisserie chicken to cut down on preparation time without sacrificing flavour.
Texture variation: For added crunch, consider topping the casserole with crushed crackers or crispy onions before the final bake.
Make ahead: Assemble the casserole a day in advance and refrigerate it. Bake it just before serving for a hassle-free meal.
Freeze for later: This casserole freezes well. Once cooled, portion it out in airtight containers to freeze for up to three months. Reheat in the oven at 350°F until warmed through.
Herb enhancement: Experiment with different fresh herbs like thyme, oregano, or dill for a unique flavour profile.
Cheese alternatives: If you’re looking for a lower-fat option, substitute with reduced-fat cheese varieties without compromising too much on taste.

Serving Suggestions

This comforting casserole pairs wonderfully with a variety of side dishes to create a well-rounded meal. Consider serving it alongside a fresh garden salad drizzled with a light vinaigrette for a crisp complement. Roasted or steamed seasonal vegetables, such as asparagus or broccoli, can add a delightful contrast in texture and nutrition.

For a heartier option, warm crusty bread or garlic bread is perfect for mopping up any creamy sauce. Alternatively, a side of applesauce or a fruit salad can provide a refreshing, sweet balance to the richness of the casserole.

Enjoy your meal with a glass of white wine, or opt for a sparkling water to keep things light and refreshing.

Storage & Reheating

To store the leftover casserole, allow it to cool completely before transferring it to an airtight container. It can be refrigerated for up to four days.

For longer storage, this casserole freezes well; simply portion it into airtight containers or freezer-safe bags and freeze for up to three months. When you’re ready to enjoy it again, you can reheat the casserole directly from the freezer or after thawing in the refrigerator overnight.

Preheat your oven to 350°F (175°C) and place the casserole in an oven-safe dish. Cover with foil to prevent drying out and bake for approximately 25-30 minutes, or until warmed through. If reheating from frozen, increase the baking time to about 60-75 minutes, checking to ensure it’s heated thoroughly. For an even crispier top, uncover the dish during the last 10-15 minutes of baking.

Recipe FAQ

Can I use other types of pasta instead of egg noodles?

Absolutely! Feel free to substitute egg noodles with other pasta shapes, such as penne, fusilli, or rotini. Just make sure to adjust the cooking time based on the type of pasta you choose.

Is it possible to make this casserole gluten-free?

Yes, you can easily make this casserole gluten-free by using gluten-free pasta and ensuring that all other ingredients, including the cream of mushroom soup and sour cream, are gluten-free versions.

What other proteins can I use in this casserole?

In addition to shredded chicken, cooked shredded beef, turkey, or even a mix of beans can work well. For a vegetarian option, consider using quinoa or more legumes like black beans for added flavour and texture.

Can I prepare this casserole ahead of time and bake it later?

Certainly! You can assemble the casserole ahead of time, cover it well, and refrigerate it until you’re ready to bake. Just be sure to add a little extra baking time if baking from cold.

What can I do if the casserole is too dry after baking?

If the casserole turns out to be too dry, you can add a splash of chicken broth or milk before serving to moisten it. Alternatively, consider serving it with extra sauce or gravy on the side.