Cordon Bleu Casserole

Cordon Bleu Casserole is loaded with chicken (or turkey) and ham in a creamy Swiss cheese sauce topped with a layer of toasty bread crumbs!

Cordon Bleu Casserole ~ loaded with chicken (or turkey) and ham in a creamy Swiss cheese sauce topped with a layer of toasty bread crumbs for a decadent, delicious dinner that's perfect for using up Thanksgiving leftovers with Text Overlay


Today's Cordon Bleu Casserole is the happy result of figuring out what to do with my Thanksgiving leftovers this past weekend. And it is so, so, so good, y'all. If you still have leftover turkey and ham, I'd highly recommend you give this one a try, even if you only have enough for a half-recipe. If you've already frozen your leftovers, pull up this recipe when you thaw them. And if your leftovers are long gone, keep this recipe in mind for the day after Christmas. Or buy a rotisserie chicken and a hunk of ham and give it a whirl any time you like!

Chicken Cordon Bleu Casserole in Red Baking Dish on Red Striped Tea Towel

Chicken Cordon Bleu was one of my favorite things to eat growing up. And while it's not particularly difficult to assemble, pounding and layering and rolling and pan-frying can be a bit time-consuming, so I don't find myself making it very often as a busy mom with three kids.

Thanksgiving Leftovers Casserole Served with Peas on a White Plate

But I still adore it. In fact, I developed a recipe for Chicken Cordon Bleu Soup for my cookbook (which has actually turned out to be one of my favorite cookbook recipes) and now I've adapted a dish I found in my mom's recipe files years ago: Cordon Bleu CASSEROLE! You'll notice I didn't title it Chicken Cordon Bleu Casserole, because I actually made it with my aforementioned leftover Thanksgiving turkey. I assure you, it's absolutely delicious either way.

Aerial View of Leftover Turkey Recipe

How to Make It

And have I mentioned how easy it is to throw together?

  1. Quickly cube up come chicken (or turkey) and ham.
  2. Then make a simple stovetop bechamel sauce using butter, flour, and milk -- basically a white sauce that's much easier and less fancy-schmancy than it sounds.
  3. After the bechamel is thickened and silky, gradually stir in grated Swiss cheese. I highly, highly recommend Gruyere if you don't mind splurging a bit...your cheese sauce will end up smelling just like Swiss fondue, another favorite from my childhood. Can you tell I was raised by a European mother? Ha.
  4. Combine the chicken/turkey and ham with the Swiss cheese sauce in a baking dish.
  5. Top that glorious deliciousness with a mixture of breadcrumbs and a bit more grated cheese, then drizzle with butter.
  6. Finally, bake until golden and bubbly!
Close-Up of Turkey Cordon Bleu Served with Peas on White Plate

I can't even describe how scrumptious this Cordon Bleu Casserole is, friends.

Rich and decadent, indeed, but worth every calorie.

In fact, it's so amazingly flavorful that my family forgot it ever started with leftover turkey and ham.

What Thanksgiving leftovers?


Helpful Tips, Tricks, & Equipment

  • While I can't imagine making this recipe without Gruyere, I realize that not everyone adores the flavor of Swiss cheese, particularly certain kiddos. So you could swap out the Swiss for your favorite cheese...cheddar, gouda, or even pepper jack. You can basically think of this recipe like mac & cheese with poultry and ham instead of the pasta. Feel free to play with the cheese!
  • Along the same lines, you can add veggies to this dish. Thawed frozen peas or broccoli florets would be yummy.
  • You could even add egg noodles to this recipe. Just be sure to account for the extra volume with a larger baking dish and an increased amount of cheese sauce (1.5 to 2 times the original amount, depending on how much pasta you add); otherwise you may end up with a dry casserole.
  • The breadcrumbs on top are also flexible. I had a stale loaf of French bread that I didn't end up needing when I make Thanksgiving stuffing last week, so I threw chunks into my mini food processor and made fresh breadcrumbs out of that. You could also use leftover holiday dinner rolls. But homemade or store-bought dried breadcrumbs (or even panko breadcrumbs) would work as well.
  • Don't be afraid of the cheese sauce! The key is patience and constant whisking, but overall, it comes together easily and pretty quickly. If you step away for a moment and come back to realize your sauce has stuck to the bottom and burned, don't panic! All is not lost...yet. Quickly pour the sauce into a new pot -- without scraping the brown stuff stuck to the bottom of the first pot -- and proceed with the recipe, resolving not to walk away this time. Ask me how I know...?
  • Also exercise patience when stirring the grated cheese into the white sauce. Once the sauce is thickened, remove the pot from the burner and stir in the cheese ¼ cup at a time until completely melted. Then stir in the next ¼ cup of cheese. This will prevent lumpy sauce.
  • How much salt you add to the cheese sauce depends on how salty your chicken/turkey/ham are to begin with. The turkey I used was not brined and the ham was not overly salty, so I used ½ teaspoon salt and it was perfect.
  • I prefer making this recipe in a 2-quart baking dish with a greater surface area for scattering my breadcrumbs (for example, a shallow rectangular baking dish as opposed to a deep square one).
Perfect Bite of Chicken Cordon Bleu Casserole

More Casseroles to Use Up Leftover Chicken (or Turkey)

Cordon Bleu Casserole on plate with fork.

Cordon Bleu Casserole

Cordon Bleu Casserole is loaded with chicken (or turkey) and ham in a creamy Swiss cheese sauce topped with a layer of toasty bread crumbs!
Course: Main Course
Cuisine: French
Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Servings: 8 servings
Calories: 504kcal
Print Pin Rate


  • 4 cups cubed cooked chicken OR turkey
  • 2 cups cubed cooked ham
  • 4 tablespoons (¼ cup) butter
  • 2 cloves garlic, minced
  • cup flour
  • 2 ¼ cups very warm milk
  • ¼ to ½ teaspoon salt
  • teaspoon garlic powder
  • teaspoon ground mustard powder
  • teaspoon ground nutmeg
  • Freshly ground black pepper
  • 1 ½ cups (6 ounces) grated Gruyere OR Swiss cheese

For the topping:

  • 1 ½ cups breadcrumbs
  • ½ cup (2 ounces) grated Gruyere OR Swiss cheese
  • 4 tablespoons (¼ cup) butter, melted
  • Fresh minced parsley, for garnish (optional)


  • Place rack in center position of oven. Preheat oven to 350°F. Grease a 2-quart baking dish or spray with nonstick cooking spray. Add the chicken/turkey and ham to the baking dish and set aside.
  • In a medium saucepan set over medium-high heat, melt the butter. Add the garlic and sautee until fragrant. Add the flour and and cook for 1 to 2 minutes until bubbly but not brown, whisking continuously. Gradually stir in the milk, rapidly stirring until smooth. Bring to a simmer and cook, whisking continuously, for a 2 to 3 minutes until the sauce is thickened. Remove the saucepan from the heat. Stir in the salt, garlic powder, mustard powder, nutmeg and pepper. Then whisk in the cheese, ¼ cup at a time. Stir the cheese until completely melted before adding the next ¼ cup. Pour the sauce over the chicken/turkey and ham in the baking dish and toss and stir to coat.
  • Combine the breadcrumbs and remaining grated cheese in a medium bowl. Sprinkle over the casserole. Evenly drizzle the butter over the breadcrumbs. Bake, uncovered, for 30 minutes or until golden brown and bubbly. Allow to sit for a few minutes before serving. Sprinkle with fresh parsley, if desired.


Calories: 504kcal | Carbohydrates: 24g | Protein: 36g | Fat: 29g | Saturated Fat: 15g | Polyunsaturated Fat: 3g | Monounsaturated Fat: 8g | Trans Fat: 1g | Cholesterol: 135mg | Sodium: 781mg | Potassium: 404mg | Fiber: 1g | Sugar: 5g | Vitamin A: 714IU | Vitamin C: 7mg | Calcium: 344mg | Iron: 2mg
Made this recipe? I'd love to see on IG!Mention @FiveHeartHome or tag #FiveHeartHome!

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Recipe Rating


  1. 5 stars
    This casserole is amazing! It does not taste like you are eating leftovers at all. It left my family so content. My sons (ages 15 and 11) kept going back for more. My youngest son and my hubby took it for their lunches the next day as well, leaving me a tiny little bit for mine. Great way to use up leftover turkey and ham. I will definitely be making this again!

    One small thing - when I tried to print it from my mobile phone, the default font was gray instead of black and I could not read the printed version. However, it works perfectly from the PC. I can read it fine. Keep up the great work and thank you for sharing this recipe!

  2. Is it all purpose flour you use in the sauce? Sorry for the amateur cook question but I wanted to double check since sauces can be tricky for folks like me!

    1. Hi Brandie! Yes, all-purpose flour will work great! I have also used whole wheat pastry flour or even a gluten-free flour blend to thicken my sauces and those have worked fine as well. Hope that helps and hope you enjoy! 🙂

  3. 4 stars
    By mistake, I thought this was with pasta. Ended up mixing in a pound of cooked spiral pasta and topped with pinko bread crumbs. Ended up very good.

  4. 5 stars
    I made this recipe exactly as (& for the optional choices I did 1/2 Swiss 1/2 White cheddar; and chicken & ham). It was ammaaaazzzing. Definitely an instant favorite & even teenager approved 🙂

  5. 5 stars
    We make a similar one but we use some of the leftover gracy, cheeseball, sour cream in the sauce and it is a noodle casserole. Always a favorite aND for being leftovers it's a brand new meal that everyone loves.