Layered Inheritance Chicken Casserole with Creamy Mushroom Sauce

By AislePrompt Editorial · Published 2026-05-01 · Updated 2026-05-01

A comforting baked chicken casserole that layers tender chicken breasts with a rich, creamy mushroom sauce, inspired by the concept of method inheritance and layering. This American-inspired game-day recipe, ready in about 45 minutes, pairs chicken breasts, olive oil, button mushrooms for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 420 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 4 pieces (6 oz each) chicken breasts
• 2 tbsp olive oil
• 8 oz, sliced button mushrooms
• 3 cloves, minced garlic cloves
• 2 tbsp all-purpose flour
• 1 cup chicken broth
• 1 cup heavy cream
• 1/2 cup grated Parmesan cheese
• 1 tsp fresh thyme leaves
• 1 tsp salt
• 1/2 tsp black pepper
• 2 tbsp for garnish chopped parsley

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Instructions

1. Step 1: Preheat oven to 375°F. Heat 2 tbsp olive oil in a large skillet over medium heat. Season 4 chicken breasts with 1 tsp salt and 1/2 tsp black pepper, then sear the chicken for 4 minutes per side until golden but not fully cooked. Remove and set aside.
2. Step 2: In the same skillet, add 8 oz sliced button mushrooms and 3 minced garlic cloves, sautéing for 5 minutes until mushrooms release moisture and edges turn golden and fragrant.
3. Step 3: Sprinkle 2 tbsp all-purpose flour over mushrooms and stir constantly for 1 minute to cook the flour taste out.
4. Step 4: Slowly whisk in 1 cup chicken broth and 1 cup heavy cream, cooking over medium heat and stirring until the sauce thickens and coats the back of a spoon, about 4 minutes. Stir in 1/2 cup grated Parmesan cheese and 1 tsp fresh thyme leaves.
5. Step 5: Place the seared chicken breasts in a baking dish and pour the creamy mushroom sauce evenly over them.
6. Step 6: Bake uncovered for 20 minutes until the chicken reaches an internal temperature of 165°F and the sauce bubbles.
7. Step 7: Garnish with 2 tbsp chopped parsley before serving warm.