This Chicken Cordon Bleu Casserole delivers all the sophisticated flavors of the classic French-inspired dish without the tedious rolling and breading. It is a comforting, creamy meal that transforms simple ingredients like rotisserie chicken and deli ham into a family favorite. Whether you are looking for a weeknight dinner or a way to repurpose holiday leftovers, this recipe is a guaranteed crowd-pleaser.
Table of Contents
Why You Will Love This Recipe
You will love this Chicken Cordon Bleu Casserole because it offers the perfect balance of savory ham, tender chicken, and nutty Swiss cheese in every bite. Unlike the traditional version, which can be a labor of love to prepare, this casserole version is incredibly easy to assemble and bake. The addition of a tangy Dijon mustard sauce and a crunchy, buttery panko topping provides a gourmet texture and flavor profile with minimal effort. It is the ultimate “win-win” dish for busy home cooks who still want to serve something special.
Ingredients
- 1 rotisserie chicken, skin removed and shredded
- 2 cups cubed fully cooked ham
- 4 ounces Swiss cheese, thinly sliced
- 1/4 cup butter, cubed
- 1/4 cup all-purpose flour
- 2-1/2 cups 2% milk
- 2 tablespoons lemon juice
- 1 tablespoon Dijon mustard
- 1/2 teaspoon salt
- 1/4 teaspoon pepper
- 1-1/2 cups panko bread crumbs
- 6 tablespoons butter, melted
- 1-1/2 teaspoons dried parsley flakes
Step-by-Step Instructions
- Prepare the Oven and Dish: Preheat your oven to 350°F. Grease a 13x9x2-inch baking dish to ensure the casserole does not stick.
- Layer the Meat and Cheese: Arrange the shredded rotisserie chicken evenly in the bottom of the prepared baking dish. Sprinkle the cubed ham over the chicken, then top with a single layer of the Swiss cheese slices.
- Create the Roux: In a small saucepan over medium heat, melt the 1/4 cup of cubed butter. Stir in the flour until a smooth paste forms, creating a roux that will thicken your sauce.
- Prepare the Creamy Sauce: Gradually whisk the milk into the roux. Continue to stir constantly and bring the mixture to a boil. Cook and stir for about 2 to 3 minutes until the sauce has thickened. Remove from heat and stir in the lemon juice, Dijon mustard, salt, and pepper.
- Add the Sauce: Pour the hot sauce evenly over the layer of cheese in the baking dish.
- Prepare the Crunchy Topping: In a small bowl, combine the panko bread crumbs, 6 tablespoons of melted butter, and the dried parsley. Toss well to coat the crumbs, then sprinkle them evenly over the top of the casserole.
- Bake and Rest: Bake the casserole uncovered for 40 to 45 minutes, or until the sauce is bubbling and the bread crumbs have turned a beautiful golden brown. Let the dish stand for 5 minutes before serving to allow the sauce to set.
Expert Tips / Pro Tips
To ensure the smoothest sauce possible, remember that gradually adding the milk to your roux is the secret to avoiding lumps. Constant whisking during this stage is essential. Another pro tip involves the resting period; allowing the Chicken Cordon Bleu Casserole to stand for at least five minutes before slicing makes it much easier to cut into clean, attractive portions. Finally, for the best texture, use panko bread crumbs rather than traditional bread crumbs, as they absorb less moisture and provide a superior crunch.
Add Vegetables: You can easily boost the nutritional value by adding broccoli, bell peppers, zucchini, or mushrooms to the chicken and ham layers.
Try Different Cheeses: While Swiss is traditional, you can substitute it with Gruyere, white cheddar, provolone, or even mozzarella for a different flavor profile.
Add Hearty Noodles: For a more filling meal, mix cooked egg noodles or penne pasta into the dish before adding the sauce.
Protein Swaps: If you do not have chicken, leftover roasted turkey works perfectly. You can also swap the ham for crispy chopped bacon or prosciutto for a saltier, more intense flavor.
Spice it Up: Add a pinch of garlic powder, smoked paprika, or Italian seasoning to the panko topping for an extra flavor boost.
Serving Suggestions
This creamy Chicken Cordon Bleu Casserole pairs beautifully with a variety of side dishes. For a classic pairing, serve it over a bed of steamed white rice or buttered egg noodles. If you prefer something lighter, a crisp green salad with a vinaigrette or roasted vegetables like asparagus and glazed carrots will balance the richness of the cheese sauce. Potato lovers can serve this alongside mashed potatoes or roasted fingerling potatoes for the ultimate comfort meal.
Storage: Once the casserole has cooled completely, wrap it tightly or transfer leftovers to an airtight container. It will keep well in the refrigerator for up to three days.
Freezing: This dish is very freezer-friendly. You can freeze it either baked or unbaked for up to three months. Thaw it in the refrigerator overnight before you plan to reheat or bake it.
Reheating: To reheat a cooked casserole, place it in a 350°F oven for 15 to 20 minutes until warmed through. If you are baking an unbaked frozen (but thawed) casserole, it may require 50 to 55 minutes at 350°F.
Nutrition Information
| Nutrient | Amount Per Serving (1 Cup) |
| Calories | 489 kcal |
| Total Fat | 29g |
| Saturated Fat | 15g |
| Cholesterol | 156mg |
| Sodium | 899mg |
| Total Carbohydrates | 15g |
| Sugars | 4g |
| Protein | 41g |
Chicken Cordon Bleu Casserole
Ingredients
Equipment
Method
- Preheat your oven to 350°F and grease a 13x9x2-inch baking dish.
- Arrange the shredded rotisserie chicken evenly in the bottom of the prepared baking dish, sprinkle the cubed ham over the chicken, then top with a single layer of the Swiss cheese slices.1 rotisserie chicken, 2 cups fully cooked ham, 4 ounces Swiss cheese
- In a small saucepan over medium heat, melt the 1/4 cup of cubed butter, then stir in the flour until a smooth paste forms to create a roux.1/4 cup butter, 1/4 cup all-purpose flour
- Gradually whisk the milk into the roux, cooking and stirring constantly for 2 to 3 minutes until thickened; remove from heat and stir in the lemon juice, Dijon mustard, salt, and pepper.2-1/2 cups 2% milk, 2 tablespoons lemon juice, 1 tablespoon Dijon mustard, 1/2 teaspoon salt, 1/4 teaspoon pepper
- Pour the hot sauce evenly over the layer of cheese in the baking dish.
- In a small bowl, combine the panko bread crumbs, 6 tablespoons of melted butter, and the dried parsley, tossing to coat before sprinkling evenly over the top of the casserole.1-1/2 cups panko bread crumbs, 6 tablespoons butter, 1-1/2 teaspoons dried parsley flakes
- Bake uncovered for 40 to 45 minutes until the sauce is bubbling and the crumbs are golden brown, then let stand for 5 minutes before serving.
Notes
FAQ
What is the best type of chicken to use for this casserole?
Any cooked chicken will work, but a store-bought rotisserie chicken is the most convenient option. You can use a mix of breast and thigh meat depending on your preference for lean or juicy meat. Do not use raw chicken, as it will not cook through properly in the allotted time.
Can I make this dish ahead of time?
Yes, you can assemble the casserole (without the panko topping) up to a day in advance and store it in the fridge. Add the panko topping just before sliding it into the oven to ensure it stays crunchy.
Is there a substitute for Swiss cheese?
If you are not a fan of Swiss cheese, Gruyere is the closest flavor match. For a milder taste, Monterey Jack or Provolone are excellent melting alternatives that still pair well with ham and chicken.
Why is my panko topping soggy?
Soggy topping usually happens if the casserole is covered during baking or if it is stored with the topping on for too long before reheating. Always bake uncovered to allow the moisture to escape and the bread crumbs to crisp up.