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chicken spaghetti casserole on a plate
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Chicken Spaghetti Casserole

While this creamy chicken spaghetti casserole recipe is doable on a busy weeknight, it’s full of wholesome ingredients and deep rich flavors.
Course Chicken Dinner, Main Course
Cuisine American
Keyword chicken casserole recipes, chicken pasta casserole recipes, chicken spaghetti recipes, pasta casserole recipes, spaghetti casserole recipes
Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Servings 8 servings
Calories 771kcal
Author Kathleen

Ingredients

  • 16 ounces spaghetti
  • 1/2 cup butter divided
  • 1 medium onion, chopped
  • 2 poblano peppers, chopped
  • 1 jalapeno, ribs removed, seeded and chopped
  • 1 tablespoon garlic, minced
  • 1/2 cup all-purpose flour
  • 1 tablespoon chili powder
  • 1 tablespoon ground cumin
  • 2 teaspoons ground coriander
  • 2 teaspoons dried oregano
  • 2 1/2 cups whole milk
  • 1 (12 ounce) can beer
  • 1 tablespoon Worcestershire sauce
  • 1/2 cup chili sauce
  • 1 1/2 teaspoons salt
  • 1/2 teaspoon black pepper
  • 3 cups Monterey Pepper Jack cheese, - divided shredded
  • 4 cups chicken, cubed or shredded
  • 1 cup cheddar cheese, shredded
  • 2 tablespoons cilantro, chopped

Instructions

  • Preheat oven to 350°F (177°C). Spray an 11X14 inch baking dish with nonstick cooking spray.
  • Cook spaghetti (16 ounces) in well-salted water according to package instructions just to al dente. Drain pasta well then add back to the pasta pot.

Sauce:

  • In a large skillet, add 2 tablespoons butter and saute onion (1), garlic (1 tablespoon), poblano (2), and jalapeno (1) over medium-high until onion is translucent but not brown.
  • Add the remaining butter to the skillet and melt. When butter begins to bubble, sprinkle flour (1/2 cup), chili powder (1 tablespoon), cumin (1 tablespoon), coriander (2 teaspoons), and oregano (2 teaspoons) over the top and whisk over medium heat until evenly combined. Cook, stirring constantly, until spices become fragrant, about 1-2 minutes.
    Step 1 How to make chicken spaghetti casserole, sauteing ingredients
  • Remove skillet from heat and slowly whisk in milk (2 1/2 cups) and beer (1 can). Return to medium heat and cook until the mixture begins to bubble and thicken. Reduce heat to low and stir in Worcestershire Sauce (1 tablespoon), chili sauce (1/2 cup), salt (1 1/2 teaspoon), pepper (1/2 teaspoon), and 1 1/2 cups Monterey Pepper Jack cheese.
    Step 2 How to make creamy chicken spaghetti casserole, mixing cheese in sauce
  • Pour sauce over pasta in the pot, add chicken (4 cups) then toss to coat evenly. Pour into the prepared baking dish, sprinkle the remaining Monterey pepper jack and cheddar (1 cup) over the top. Bake in the preheated oven until heat through and bubbly, about 25-30 minutes. Remove from oven, garnish with cilantro (2 tablespoons), and serve.
    Step 3 How to make chicken spaghetti casserole, ingredients in a pot

Nutrition

Serving: 1/8 of the recipe | Calories: 771kcal | Carbohydrates: 61g | Protein: 36g | Fat: 41g | Saturated Fat: 22g | Cholesterol: 133mg | Sodium: 1198mg | Potassium: 582mg | Fiber: 5g | Sugar: 9g | Vitamin A: 1591IU | Vitamin C: 31mg | Calcium: 558mg | Iron: 3mg