Recipe Background
This chicken casserole is tops! Seriously! Killer Chicken Casserole doesn't exaggerate when it says it's killer! The chicken is just beautiful — juicy and tender, golden and savory, pairing fantastically with the beefy mushrooms and sweet onions. The deliciously creamy sauce everything is swimming in? Just the proverbial cherry on top. Killer Chicken Casserole is here to make a statement and that statement is "yum!"
This chicken casserole is tops! Seriously! Killer Chicken Casserole doesn't exaggerate when it says it's killer! The chicken is just beautiful — juicy and tender, golden and savory, pairing fantastically with the beefy mushrooms and sweet onions. The deliciously creamy sauce everything is swimming in? Just the proverbial cherry on top. Killer Chicken Casserole is here to make a statement and that statement is "yum!"
Ingredients
For the casserole:
- 2 1/2 pounds chicken breasts boneless and skinless, cut into 1-inch-thick strips
- 1 1/2 teaspoons sea salt
- 1/4 teaspoon black pepper
- 1 cup all-purpose flour
- 6 tablespoons olive oil divided
- 1 (16-ounce) package white mushrooms thickly sliced
- 1 medium onion finely diced
- 3 cloves garlic minced
For the sauce:
- 3 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 1 1/2 cups chicken broth
- 1 tablespoon lemon juice
- black pepper to taste
- 1 cup half-and-half
- table salt to taste
- fresh parsley leaves optional, to taste, for garnish
Directions
- Preheat the oven to 350 degrees F.
- Season the chicken strips with 1 1/2 teaspoons of the sea salt and 1/4 teaspoon of the black pepper.
- Dredge the chicken strips in 1 cup of the all-purpose flour until well-coated.
- In a large skillet over medium-high heat, add 3 tablespoons of the oil.
- Add the dredged chicken strips and cook, while stirring, until they are golden but not quite cooked through, about 3 minutes. You may need to cook the chicken strips in batches to avoid overcrowding.
- Transfer the chicken strips to a 9x13-inch baking dish.
- Scrape the browned bits from the skillet, then over medium-high heat, add the remaining oil.
- Add the mushrooms and the onions to the hot oil and cook, while stirring, until soft and golden, about 4-5 minutes.
- Add the garlic to the mushroom mixture and cook, while stirring, until fragrant, about 1-2 minutes.
- Spread the mushroom mixture over the chicken strips in the baking dish.
- In the same skillet over medium heat, melt the butter.
- Add the remaining flour to the butter and cook, while stirring, until the flour is lightly golden, about 1-2 minutes.
- Add the chicken broth, the lemon juice, and the extra black pepper to the butter mixture and whisk until a smooth sauce forms.
- Add the half-and-half to the sauce and bring it to a simmer.
- Season the sauce generously with the extra table salt and the extra black pepper.
- Pour the sauce mixture over the chicken strips and the mushroom mixture in the dish.
- Cover the baking dish with foil and bake until the chicken strips reach an internal temperature of 165 degrees F, about 45 minutes.
- Serve hot garnished with the parsley leaves.
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