Creamy Chicken And Broccoli Casserole

Looking for a weeknight dinner that’s both comforting and satisfying? Our Creamy Chicken and Broccoli Casserole is the answer! This isn’t your average casserole; we’ve elevated this classic with a rich, flavorful sauce, perfectly cooked chicken and broccoli, and a golden, crunchy topping. It’s a guaranteed crowd-pleaser that’s surprisingly easy to make. Get ready to dive into a bowl of pure deliciousness!

What You’ll Need

• 500 g (1 lb 1 oz) boneless skinless chicken breasts, cut into 2‑cm (¾‑inch) cubes: Using chicken breasts ensures a tender and lean protein base. Cubing the chicken allows it to cook evenly and absorb the delicious sauce. A sprinkle of smoked paprika adds a subtle smoky depth to the chicken.
• 300 g (10 oz) fresh broccoli florets: Fresh broccoli provides a vibrant green color and a slightly crisp texture. Briefly blanching the florets before adding them to the casserole ensures they remain tender-crisp and retain their bright color.
• 30 g (2 Tbsp) unsalted butter: Butter forms the foundation of our flavorful sauce and adds richness. We use it both for sautéing and creating the roux.
• 30 g (¼ cup) all‑purpose flour: The flour is crucial for creating a smooth and creamy sauce. It’s combined with butter to form a roux, which acts as a thickening agent.
• 300 ml (1 ¼ cup) low‑sodium chicken broth: Chicken broth provides the liquid base for the sauce, infusing it with savory flavor. Opting for low-sodium allows you to control the salt level. Vegetable broth or halal-certified chicken broth can be used as substitutions.
• 200 ml (⅞ cup) whole milk: Whole milk adds creaminess and richness to the sauce.
• 100 ml (⅓ cup) heavy cream: A touch of heavy cream elevates the sauce to a luxurious consistency.
• 150 g (5 oz) sharp cheddar cheese, grated: Sharp cheddar cheese provides a bold, cheesy flavor that complements the chicken and broccoli. Grating the cheese ensures it melts evenly into the sauce.
• 30 g (¼ cup) Parmesan cheese, finely grated: Parmesan cheese adds a salty, umami-rich flavor that enhances the overall complexity of the casserole.
• 1 small onion, finely diced: Diced onion forms the aromatic foundation of the sauce, adding a subtle sweetness.
• 2 cloves garlic, minced: Minced garlic provides a sharp, pungent note that balances the richness of the cheese and cream.
• ½ tsp ground mustard powder: Ground mustard powder adds a subtle tang that brightens the flavor of the sauce.
• ¼ tsp ground nutmeg: Ground nutmeg provides a warm, subtle spice that complements the cheese and cream.
• ½ tsp smoked paprika: Smoked paprika adds a smoky accent that enhances the savory flavors of the casserole.
• Salt and freshly ground black pepper to taste: Seasoning is key! Adjust the salt and pepper to your preference.
• 30 g (¼ cup) panko breadcrumbs: Panko breadcrumbs provide a light and crunchy topping that adds texture to the casserole.
• 2 Tbsp fresh parsley, chopped: Fresh parsley adds a bright, herbaceous garnish that enhances the visual appeal and flavor of the casserole.
• 1 Tbsp lemon zest: Lemon zest adds a fresh, zingy note that cuts through the richness of the sauce.

Step-by-Step Instructions for the Perfect Creamy Chicken and Broccoli Casserole

1. Preheat and Prepare: Begin by preheating your oven to 180°C (350°F). This ensures even cooking. While the oven heats, lightly grease a 33 x 23 cm (9 x 13-inch) baking dish. Using butter or a neutral oil spray prevents sticking and makes serving easier.
2. Sauté the Chicken: Season the cubed chicken with salt, pepper, and a pinch of smoked paprika. The smoked paprika adds a subtle smoky depth that complements the creamy sauce. Melt 15g (1 tbsp) butter in a large skillet over medium-high heat. Add the chicken and cook, stirring occasionally, until browned on all sides – about 4 minutes. Browning the chicken creates a richer flavor profile through the Maillard reaction. Transfer the browned chicken to a plate and set aside.
3. Blanch the Broccoli: Blanching the broccoli ensures it retains its vibrant green color and a slight crisp-tender texture. Bring a pot of salted water to a rolling boil. Add the broccoli florets and cook for 2 minutes. Immediately transfer the broccoli to a bowl of ice water to stop the cooking process – this is called shocking. Drain the broccoli thoroughly.
4. Prepare the Roux: A roux is the foundation of many creamy sauces, providing thickness and stability. In the same skillet used for the chicken, melt the remaining 15g (1 tbsp) butter over medium heat. Whisk in the all-purpose flour and cook, stirring constantly, for 2 minutes. The mixture should form a smooth paste and turn a light golden color. Cooking the roux removes the raw flour taste.
5. Build the Sauce: This is where the casserole’s signature creaminess comes to life. Slowly whisk in the chicken broth, milk, and heavy cream, ensuring no lumps form. Start with a small amount of liquid and gradually add more while whisking continuously. Add the finely diced onion, minced garlic, ground mustard powder, ground nutmeg, and smoked paprika. Simmer, stirring frequently, for 5-6 minutes, or until the sauce thickens and coats the back of a spoon.
6. Enrich the Sauce: Remove the sauce from the heat. Stir in the grated cheddar and Parmesan cheese until melted and smooth. The cheddar provides a sharp, classic flavor, while the Parmesan adds a savory umami boost. Taste the sauce and adjust the seasoning with salt and pepper as needed.
7. Combine Ingredients: Gently fold the browned chicken and blanched broccoli into the creamy cheese sauce. Ensure everything is well coated. Pour the mixture into the prepared baking dish, spreading it evenly.
8. Add Topping and Bake: Sprinkle the panko breadcrumbs evenly over the surface of the casserole. Dot the top with the remaining 2 tbsp of butter, cut into small pieces. This creates pockets of richness and helps the breadcrumbs brown beautifully. Finish with an extra handful of grated cheddar cheese for a golden, bubbly crust. Place the dish in the center of the preheated oven and bake for 25-30 minutes, or until the top is bubbling and the breadcrumbs are golden brown.
9. Rest and Serve: Remove the casserole from the oven and let it rest for 10 minutes before serving. This allows the sauce to set slightly, making it easier to slice and serve. Garnish with chopped fresh parsley and a sprinkle of lemon zest for a burst of freshness.

Why This Casserole Works: The Science of Creaminess

The secret to a truly creamy casserole lies in the roux. This combination of butter and flour creates a stable base for the sauce, preventing it from separating. The gradual addition of liquid, combined with constant whisking, ensures a smooth, lump-free texture. The addition of both milk and heavy cream provides richness and body, while the cheeses contribute flavor and further enhance the creaminess. The slight acidity from the mustard powder and lemon zest balances the richness, preventing it from becoming overwhelming.

Broccoli Blanching: Preserving Color and Texture

Blanching the broccoli isn’t just about partially cooking it; it’s a crucial step for maintaining its vibrant green color and a pleasant, slightly crisp texture. The brief exposure to boiling water deactivates enzymes that cause discoloration and breakdown of the broccoli’s structure. Immediately shocking it in ice water stops the cooking process, preserving its color and texture. Skipping this step can result in mushy, dull-looking broccoli.

Cheese Choices: Building Layers of Flavor

The combination of cheddar and Parmesan cheeses is deliberate. Sharp cheddar provides the classic cheesy flavor we associate with casseroles, while Parmesan adds a savory, umami-rich depth. Using a good quality cheddar makes a significant difference in the overall flavor. Feel free to experiment with other cheeses, such as Gruyère or Monterey Jack, to create your own unique flavor profile.

Tips for a Golden Brown Crust

Achieving a perfectly golden brown and crunchy topping is essential for a satisfying casserole experience. Using panko breadcrumbs provides a superior texture compared to regular breadcrumbs. Dotting the top with butter creates pockets of richness and helps the breadcrumbs brown evenly. If the breadcrumbs are browning too quickly, you can loosely tent the casserole with aluminum foil during the last few minutes of baking.

Frequently Asked Questions

Can I use frozen broccoli?

Yes, you can! If using frozen broccoli, thaw it completely and squeeze out any excess water before adding it to the casserole. It may not have the same crisp-tender texture as fresh blanched broccoli, but it will still work well.

Can I make this casserole ahead of time?

Yes, you can assemble the casserole up to 24 hours in advance. Cover it tightly and refrigerate. Add about 10-15 minutes to the baking time if baking from cold.

What can I substitute for the chicken?

You can easily substitute the chicken with cooked turkey, ham, or even chickpeas for a vegetarian option.

Enjoy Your Comfort Food!

This Creamy Chicken and Broccoli Casserole is the ultimate comfort food – perfect for a cozy night in or a potluck gathering. Don’t forget to save this recipe to Pinterest for easy access later!

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