Chicken Cordon Bleu Casserole

Chicken Cordon Bleu Casserole
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There’s just something about comfort food that feels like a hug from the inside out 🤗. Lately, my kitchen has turned into a little casserole factory, and this Chicken Cordon Bleu Casserole is the one I keep coming back to. It’s got all the goodness you expect — juicy chicken, smoky ham, creamy Swiss cheese — but with a few cozy upgrades: tender potatoes, sweet peas, and a dreamy white sauce kissed with a hint of Dijon mustard. 🎩✨

The first time I made it, it was a total “clean out the fridge” kind of night. I had some rotisserie chicken, a few slices of ham, half a bag of frozen peas, and a whole lot of cold weather cravings 🥶. I whipped up a quick Swiss cheese sauce with a little Dijon (because fancy!) and baked it all together until it was bubbling and golden.

One bite and I was hooked. It’s hearty without being heavy, cheesy without being overwhelming — and even better the next day, if you’re lucky enough to have leftovers. 😉

If you’re looking for a new crowd-pleaser (or just a cozy night-in dish), this casserole might just become your new favorite too! 🍽️❤️

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Chicken Cordon Bleu Casserole

Ingredients

  • 3 cups cooked, diced chicken

  • 1 ½ cups diced ham

  • 2 cups frozen diced potatoes (thawed)

  • 1 cup frozen peas

  • 2 tablespoons butter

  • 2 tablespoons flour

  • 2 cups milk

  • 1 ½ cups shredded Swiss cheese (plus extra for topping)

  • 1 tablespoon Dijon mustard

  • ½ teaspoon garlic powder

  • ½ teaspoon onion powder

  • Salt and pepper, to taste

  • ½ cup breadcrumbs (optional, for crunchy topping)

  • 1 tablespoon olive oil or melted butter (to toss breadcrumbs)

Instructions

  • Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.

  • In a saucepan, melt the butter over medium heat. Whisk in the flour and cook for 1 minute to form a roux.

  • Slowly whisk in the milk, stirring constantly until the sauce thickens (about 3-5 minutes).

  • Stir in the Swiss cheese and Dijon mustard until smooth. Season with garlic powder, onion powder, salt, and pepper.

  • In a large bowl, mix together the diced chicken, ham, potatoes, and peas.

  • Pour the Swiss-Dijon sauce over the mixture and gently fold to combine everything evenly.

  • Spread the mixture into the prepared baking dish. Sprinkle a little extra Swiss cheese on top for maximum gooeyness.

  • (Optional) Mix the breadcrumbs with olive oil or melted butter and sprinkle over the casserole for a crispy finish.

  • Bake uncovered for 25-30 minutes, until bubbly and lightly golden on top.

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