Description

This hearty casserole layers tender, seasoned chicken and crispy bacon with gooey cheddar cheese, all topped with buttery breadcrumbs for a satisfyingly crunchy finish. Perfect for family dinners or potlucks, it’s simple to assemble and bakes up bubbly and golden in under an hour.

Ingredients

Scale

For the Chicken Layer

1½ lbs (≈680 g) boneless, skinless chicken breasts or thighs, cut into 1″ pieces
1 tbsp olive oil
1 tsp garlic powder
1 tsp onion powder
1 tsp smoked paprika
½ tsp salt
½ tsp black pepper

For the Bacon & Cheese

6 slices bacon, cooked until crisp and roughly chopped
2 cups sharp cheddar cheese, shredded

For the Creamy Sauce

2 tbsp unsalted butter
1 small onion, finely diced
2 garlic cloves, minced
2 tbsp all-purpose flour
1¾ cups milk (whole or 2%)
½ cup sour cream or Greek yogurt
½ tsp dried thyme (or Italian seasoning)
Salt & pepper, to taste

For the Crispy Topping

1 cup panko breadcrumbs
2 tbsp unsalted butter, melted
2 tbsp finely grated Parmesan cheese
1 tbsp chopped fresh parsley (optional)

Instructions

1️⃣ Preheat & prep:
Preheat oven to 375 °F (190 °C). Lightly coat a 9×13″ baking dish with cooking spray or butter.

2️⃣ Season and cook the chicken:
In a large bowl, toss chicken pieces with olive oil, garlic powder, onion powder, smoked paprika, salt, and pepper. Heat a skillet over medium-high heat and sear chicken in batches until just golden (it will finish cooking in the oven), about 3 minutes per side. Transfer to the prepared dish.

3️⃣ Add bacon and cheese:
Scatter chopped bacon evenly over the chicken, then sprinkle the shredded cheddar on top.

4️⃣ Make the creamy sauce:
In the same skillet, melt butter over medium heat. Add diced onion and sauté until translucent, about 3–4 minutes. Stir in minced garlic and cook 30 seconds. Sprinkle in flour, whisking constantly for 1 minute to form a roux. Gradually whisk in milk until smooth. Bring to a gentle simmer, stirring, until the sauce thickens (about 2–3 minutes). Remove from heat and whisk in sour cream and dried thyme. Season to taste with salt and pepper.

5️⃣ Pour sauce over casserole:
Drizzle the creamy sauce evenly over the chicken, bacon, and cheese layers.

6️⃣ Prepare the crispy topping:
In a small bowl, combine panko, melted butter, Parmesan, and parsley (if using). Toss until breadcrumbs are evenly coated.

7️⃣ Top and bake:
Sprinkle the panko mixture evenly over the sauce. Bake, uncovered, for 20–25 minutes, until the topping is golden brown and the casserole is bubbly.

8️⃣ Rest & serve:
Let the casserole rest 5 minutes before serving to set. Garnish with extra parsley if desired.

Notes

Make-Ahead: Assemble through step 5, cover, and refrigerate up to 24 hours. Add the topping and bake when ready (you may need to add 5 extra minutes).
Breadcrumb Swap: Use crushed tortilla chips or seasoned stuffing mix for extra flavor.
Cheese Variations: Mix in pepper jack for a spicy kick or mozzarella for extra gooeyness.
Gluten-Free: Substitute a gluten-free flour for the roux and gluten-free panko.
Leftovers: Store covered in the refrigerator up to 3 days. Reheat in a 350 °F oven until warmed through and topping is crisp.

Prep Time: 20 min
Cook Time: 30 min