Chicken Cordon Bleu Casserole

  • PrepTime: 20 Mins
  • CookTime: 35 Mins
  • TotalTime: 55 Mins


  1. 4 tablespoons all-purpose flour
  2. 2 tablespoons unsalted butter
  3. 1 cup whole milk
  4. Kosher salt
  5. 1 teaspoon mustard
  6. Freshly ground black pepper
  7. 3/4 cup grated sharp cheddar cheese
  8. 3 cups shredded or chopped cooked chicken
  9. 1 cup sliced or chopped ham
  10. 1 cup breadcrumbs
  11. 1/4 cup freshly grated Parmesan
  12. For serving (optional): over pasta or with a salad


  1. Gather the ingredients. Preheat oven to 350 F.
  2. Place the flour and butter in a medium saucepan over medium heat and cook, stirring constantly, for 2 to 3 minutes to make a simple roux.
  3. Add the milk and cook, whisking constantly, over medium heat until the sauce is thickened. If the sauce is too thick, then add a little milk at a time, as needed until the consistency is thick enough to be a pourable sauce.
  4. Add a pinch each of salt and pepper, mustard, and cheddar cheese to the saucepan. Cook, whisking, until combined.
  5. Layer the chicken and ham in a small 3-pint Dutch oven, ovenproof skillet, or baking dish.
  6. Pour the cheese sauce over top.
  7. Cover the mixture with the breadcrumbs, then sprinkle the Parmesan over top. Bake on the center oven rack for 30 to 35 minutes or until the breadcrumbs are golden brown and the filling is bubbling.
  8. Remove the casserole from the oven and let stand for 5 minutes, then serve immediately with pasta, a salad, or on its own.