Chicken Spaghetti Casserole

Total Time Prep: 25 min. Bake: 25 min.
Yield 6 servings
Test Kitchen Approved
Chicken spaghetti casserole is such a fun way to serve spaghetti noodles. Baked until bubbly from the cheddar and Swiss cheeses, you'll love serving this when you want a change from typical saucy pastas.

Ingredients

  • 8 ounces uncooked spaghetti, broken into 3-inch pieces
  • 3 cups cubed cooked chicken
  • 1 can (10-3/4 ounces) condensed cream of chicken soup, undiluted
  • 1 cup 2% milk
  • 1 medium onion, chopped
  • 1 cup shredded sharp cheddar cheese, divided
  • 1 cup shredded Swiss cheese, divided
  • 1 can (4 ounces) mushroom stems and pieces, drained
  • 1/2 cup chopped roasted sweet red peppers
  • 3 tablespoons mayonnaise
  • 1-1/2 teaspoons steak seasoning
  • 1/2 teaspoon dried basil

Directions

  1. Cook spaghetti according to package directions. Meanwhile, in a large bowl, combine the chicken, soup, milk, onion, 1/2 cup cheddar cheese, 1/2 cup Swiss cheese, mushrooms, peppers, mayonnaise, steak seasoning and basil.
  2. Drain spaghetti. Add to chicken mixture; toss to coat. Transfer to a greased 13x9-in. baking dish. Cover and bake at 350° for 20 minutes. Uncover; sprinkle with remaining cheeses. Bake until heated through and cheese is melted, 5-10 minutes longer.

Nutrition Facts

1-1/3 cups: 549 calories, 25g fat (11g saturated fat), 109mg cholesterol, 957mg sodium, 40g carbohydrate (6g sugars, 2g fiber), 38g protein.

This creamy, cheesy casserole is so hearty that second helpings are a must! —Lynne German, Woodland Hills, California
Recipe Creator

© 2025 RDA Enthusiast Brands, LLC