Chicken Spaghetti Casserole


If your go-to pasta order is fettuccini alfredo, you’ll quickly fall in love with this cheesy chicken spaghetti casserole.

Chicken Spaghetti Casserole
Photo: Greg DuPree
Hands On Time:
40 mins
Total Time:
40 mins
8 servings

This chicken spaghetti casserole features a nutty, salty Asiago cheese, which makes for a rich and decadent sauce. A squeeze of lemon juice and a handful of fresh herbs keep the flavors balanced.

And because it finishes under the broiler, the dish is easy enough for even the busiest of weeknights. Have a party coming up? This simple casserole is great for big groups, especially if you serve it with a large summer salad and garlic bread. It could also work well for an easy Easter dinner.


  • 1 pound spaghetti

  • 4 tablespoons (½ stick) salted butter

  • ¼ cup all-purpose flour

  • 2 ½ cups whole milk

  • 12 ounces Asiago cheese, shredded (about 4½ cups)

  • 1 teaspoon kosher salt

  • 3 cups shredded rotisserie chicken (10 oz.)

  • 3 tablespoons finely chopped fresh basil, plus more for serving

  • 3 tablespoons finely chopped fresh flat-leaf parsley, plus more for serving

  • 3 tablespoons finely chopped fresh chives, plus more for serving

  • 1 tablespoon fresh lemon juice (from 1 lemon)


  1. Place oven rack in middle position. Preheat broiler to LOW. Lightly coat a 9-x 13-inch baking dish with cooking spray.

  2. Cook pasta according to package directions. Drain, reserving 1/2 cup cooking water. Set aside.

  3. Melt butter in a large skillet over medium-low. Add flour and cook, whisking constantly, until bubbling, about 2 minutes.

  4. Increase heat to medium; slowly whisk in milk. Cook, stirring occasionally with a wooden spoon, until sauce thickens, 5 to 6 minutes.

  5. Add cheese and salt and cook, whisking constantly, until smooth, about 2 minutes.

  6. Remove mixture from heat. Stir in chicken, basil, parsley, chives, lemon juice, and cooked pasta. Stir in reserved cooking water as needed to create a creamy sauce.

  7. Spoon mixture into prepared baking dish. Transfer to oven and broil until warmed through, about 4 minutes.

  8. Garnish with additional basil, parsley, and chives. Serve immediately.

Related Articles