One-Pot Mushroom and Thyme Chicken Casserole

By AislePrompt Editorial · ·

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

A comforting one-pan meal with chicken breast, mushrooms, and a savory herb sauce, baked until bubbly and golden. This American-inspired one-pot recipe, ready in about 55 minutes, pairs chicken breasts, butter, onion for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 500 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.

Prep: 20 min Cook: 35 min Serves 4 American cuisine 500 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 375°F (190°C). Season chicken breasts with 1/4 tsp salt and 1/4 tsp black pepper.
  2. Step 2: Melt 2 tbsp butter in a large ovenproof skillet over medium-high heat. Add chicken and cook for 5-6 minutes per side until golden brown and internal temperature reaches 165°F (74°C). Remove chicken and set aside.
  3. Step 3: Add diced onion and sliced mushrooms to the skillet. Cook for 5-6 minutes until onions are translucent and mushrooms release moisture.
  4. Step 4: Stir in minced garlic and 1 tbsp fresh thyme, cooking for 1 minute until fragrant. Sprinkle 1/4 cup all-purpose flour over vegetables and stir to form a paste.
  5. Step 5: Gradually whisk in 1/2 cup chicken broth and 1/2 cup milk, then add 1/4 tsp salt and 1/4 tsp black pepper. Cook for 3-4 minutes until sauce thickens and coats the back of a spoon.
  6. Step 6: Add 1 cup cooked rice to the skillet and stir to combine. Return chicken breasts to the skillet, nestling them into the rice and sauce. Sprinkle 1/4 cup grated cheddar cheese on top.
  7. Step 7: Bake for 15-20 minutes until cheese is melted and bubbly and chicken is heated through.

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