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Mushroom Gruyere chicken and rice casserole with tender chicken, mushrooms, leeks, and toasted almonds in a creamy sauce.

Gourmet Mushroom & Gruyère Chicken Casserole with Toasted Almonds


  • Author: Samantha Brooks
  • Total Time: 50 minutes
  • Yield: 68 servings 1x

Description

A sophisticated take on classic comfort food, blending the earthy depth of browned mushrooms with the nutty, rich flavor of melted Gruyère cheese. This velvety casserole features tender golden chicken and a toasted almond topping for a perfect balance of savory umami and satisfying textures.


Ingredients

Scale
  • 5 cups chicken breasts (bite-size pieces)
  • 2 1/4 cups sliced button mushrooms (8 oz)
  • 2 cups grated Gruyere cheese, 2 cups cooked white rice
  • 1 1/2 cups chicken broth, 1 cup diced red onion
  • 1 cup diced celery, 3/4 cup heavy cream
  • 1/2 cup slivered almonds, 1 can (10.5 oz) cream of mushroom soup
  • 2 tbsp unsalted butter, 2 tsp lemon juice
  • Kosher salt and black pepper to taste

Instructions

Sear: Preheat oven to 350°F. Melt butter in a Dutch oven. Fry chicken pieces for 5–8 mins until golden; season with salt/pepper and set aside.

Sauté: In the same pot, sauté onions for 2–3 mins. Add mushrooms and cook for 8–10 mins until deep golden brown and liquid has evaporated.

Sauce: Stir in celery, mushroom soup, and cream. Once smooth, add lemon juice, Gruyère, and cooked rice.

Combine: Return chicken and broth to the pot. Stir well and adjust seasoning.

Bake: Transfer to a buttered 9×13 dish. Top with slivered almonds. Bake for 15–20 mins until bubbling and almonds are toasted. Rest 5 mins before serving.

Notes

Don’t Rush the Mushrooms: Developing a deep golden brown on the mushrooms is the savory foundation of this ‘gourmet’ profile; rushing this step results in a flat flavor.

Rice Texture: Using pre-cooked, slightly cooled rice ensures the grains maintain their integrity during the final bake rather than turning mushy.

The Gruyère Factor: Gruyère offers a specific nutty complexity. If unavailable, high-quality Swiss or aged white cheddar are the best functional substitutes.

  • Prep Time: 15 minutes
  • Cook Time: 35 minutes
  • Category: Main Course / Casserole
  • Method: Stovetop / Baking
  • Cuisine: American-French Fusion

Nutrition

  • Serving Size: 1.5 cups
  • Calories: 495
  • Sugar: 3
  • Sodium: 780
  • Fat: 32
  • Saturated Fat: 18
  • Unsaturated Fat: 14
  • Trans Fat: 0.5
  • Carbohydrates: 22
  • Fiber: 2
  • Protein: 34
  • Cholesterol: 125

Keywords: mushroom gruyere chicken casserole, chicken and rice bake, gourmet comfort food, cheesy mushroom chicken, slivered almond topping