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dijon mustard sauce over chicken cordon bleu casserole
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5 from 7 votes

Chicken Cordon Bleu Casserole

Chicken Cordon Bleu Casserole has all of the great flavor of homemade chicken cordon blue, but it is much easier to make with rotisserie chicken.
Prep Time20 minutes
Cook Time20 minutes
Total Time40 minutes
Course: Main Course
Cuisine: American
Servings: 6 servings




  • 1 T butter
  • 1 T all-purpose flour
  • 1 1/4 cup whole milk
  • 2 T Dijon mustard
  • 3 T parmesan cheese grated
  • 1 tsp fresh thyme fresh preferred, 1/2 tsp dried will work


  • Preheat oven to 350 degrees F.
  • Remove chicken from bones and shred. Bones and skin can be tossed inyour Instant Pot with water for a couple hours to make some chicken broth for later! Combine shredded chicken with ham, swiss cheese, and chicken broth in large casserole dish.
    ham swiss and chicken for chicken cordon bleu casserole
  • In a separate bowl, combine bread crumbs, parmesan, melted butter and garlic herb seasonings. Sprinkle over chicken. Cover and bake until heated through and cheese has melted, about 20 minutes.
    ham swiss and chicken covered with breadcrumbs for chicken cordon bleu casserole
  • While the casserole is cooking, make the sauce. In a saucepan melt the butter, then add the flour and whisk together. Cook for several minutes while continually whisking to avoid burning. 
  • Gradually whisk in milk. Continue to heat until the milk bubbles and begins to thicken, about 3-5 minutes. Remove from heat and whisk in dijon, parmesan, and thyme. Add salt and pepper to taste.
  • To serve, pour warm sauce over casserole.


Calories: 386kcal | Carbohydrates: 9g | Protein: 22g | Fat: 28g | Saturated Fat: 16g | Cholesterol: 87mg | Sodium: 948mg | Potassium: 237mg | Sugar: 3g | Vitamin A: 700IU | Vitamin C: 1.6mg | Calcium: 427mg | Iron: 0.9mg