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Creamy Chicken Spaghetti Casserole


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  • Author: chef-ava
  • Total Time: 45 minutes
  • Yield: 4 servings 1x
  • Diet: None

Description

A refined comfort dish featuring creamy béchamel-style sauce, tender chicken, and a crunchy panko topping.


Ingredients

Scale
  • 8 oz (225 g) spaghetti – cooked 1–2 minutes shy of al dente, drained
  • 3 cups shredded cooked chicken (rotisserie recommended), warm or room temperature
  • 2 tbsp unsalted butter, room temperature
  • 1 tbsp olive oil
  • 1 small yellow onion, finely diced
  • 2 garlic cloves, minced
  • 2 tbsp all-purpose flour
  • 1½ cups low-sodium chicken stock
  • 1 cup heavy cream
  • 4 oz (115 g) cream cheese, softened
  • 1 tsp Dijon mustard
  • 1 cup grated Gruyère (or sharp cheddar), finely grated
  • ¼ cup freshly grated Parmesan
  • ½ tsp lemon zest (optional)
  • Kosher salt and freshly ground black pepper, to taste
  • Fresh parsley, finely chopped, for finishing
  • 1 cup panko breadcrumbs (or a mix of panko and leftover breadcrumbs)
  • 2 tbsp melted butter
  • 2 tbsp grated Parmesan for sprinkling

Instructions

  1. Preheat the oven to 375°F (190°C) and butter a 9×13-inch baking dish.
  2. Cook the spaghetti in salted boiling water until 1–2 minutes before al dente. Drain and toss with a teaspoon of olive oil to prevent sticking.
  3. In a skillet over medium heat, warm the butter and olive oil. Add the onion and cook until translucent, about 4–5 minutes. Add garlic and cook for 30 seconds until fragrant.
  4. Sprinkle the flour over the aromatics and stir for 1 minute to form a roux. Gradually whisk in the chicken stock and bring to a gentle simmer. Stir in the heavy cream, and let the sauce thicken.
  5. Reduce heat, stir in cream cheese and Dijon until incorporated. Fold in Gruyère and Parmesan, then season with salt, pepper, and lemon zest.
  6. Combine cooked spaghetti, chicken, and sauce in a large bowl. Transfer to the baking dish and smooth the surface.
  7. Mix panko with melted butter and remaining Parmesan, scatter over the top.
  8. Bake for 20–25 minutes until filling is bubbling and topping is golden. Finish under the broiler for 1–2 minutes if needed.
  9. Let the casserole rest for 8–10 minutes before serving, and garnish with parsley.

Notes

Use rotisserie chicken for convenience and layer flavors by grating cheese yourself. For a lighter option, substitute heavy cream with half-and-half mixed with flour.

  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Category: Main Course
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 400
  • Sugar: 5g
  • Sodium: 600mg
  • Fat: 22g
  • Saturated Fat: 10g
  • Unsaturated Fat: 10g
  • Trans Fat: 0g
  • Carbohydrates: 36g
  • Fiber: 2g
  • Protein: 25g
  • Cholesterol: 70mg