Chicken and Wild Rice Casserole Recipe: Creamy Mushroom and Herb Layered Delight

This layered casserole brings comfort food to a new level with its creamy mushroom sauce and aromatic herbs. I developed this recipe for my Charleston pop-up dinners, where it became an instant crowd favorite.

The secret lies in properly cooking the wild rice blend first, then combining it with tender chicken, earthy mushrooms, and a rich, velvety sauce. It’s a one-dish meal that feels special enough for company but simple enough for a weeknight.

Each bite delivers perfectly cooked rice, juicy chicken, and that signature creamy texture that makes this dish so satisfying. The herbs add just the right amount of freshness to balance the richness.

Bake until golden and bubbling for a meal that’s as beautiful as it is delicious. This casserole serves six generously and reheats beautifully.

Ingredients for Chicken and Wild Rice Casserole

Six generous servings packed with wild rice, chicken, mushrooms, and a velvety sauce.

The wild rice blend is key—Lundberg or Uncle Ben’s work great and are easy to find at most supermarkets. For the chicken, I prefer Costco’s organic breasts for their consistent size and quality (plus they’re already trimmed). Mushrooms should be fresh and firm; creminis give that earthy depth, but white button mushrooms will do in a pinch.

No whole milk? Half-and-half plus a splash of water gets you close. Fresh herbs are ideal, but dried at one-third the amount works if that’s what’s in your spice rack. If you’re out of chicken broth, vegetable broth plus a bouillon cube does the trick. The heavy cream can be swapped for full-fat coconut milk if you need a dairy-free option.

Assemble this ahead and refrigerate overnight—bake straight from the fridge, adding 10-15 minutes to the cooking time. Leftovers keep for 4-5 days in the fridge or freeze for 3 months. Reheats like a dream.

Step-by-Step Instructions for Chicken and Wild Rice Casserole

Here’s my foolproof method for building this rich, comforting dish layer by layer.

Step 1: Cook the Wild Rice Blend

Rinse the 2 cups Wild Rice Blend under cold water to remove any excess starch. In a medium saucepan, combine the rice with 2 cups Chicken Broth and bring to a boil over high heat.

Once boiling, reduce to a simmer, cover, and cook for 40-45 minutes until the rice is tender and the liquid is absorbed. Stir in ½ tsp Salt during the last 5 minutes of cooking. This ensures the grains stay separate and absorb maximum flavor.

Step 2: Sauté the Chicken and Vegetables

While the rice cooks, melt ¼ cup Unsalted Butter in a large skillet over medium-high heat. Add the diced Yellow Onion and cook for 3 minutes until translucent.

Add the 2 lb Boneless Skinless Chicken Breasts (cut into bite-sized pieces) and cook for 6-8 minutes until no longer pink inside. Remove the chicken and set aside. In the same skillet, add the remaining ¼ cup Unsalted Butter, then sauté the 12 oz Cremini Mushrooms and 4 cloves Garlic Cloves for 5 minutes until the mushrooms release their moisture and begin to brown.

Step 3: Create the Creamy Herb Sauce

Sprinkle the 0.33 cup All-Purpose Flour over the mushrooms and stir to coat. Slowly pour in the 2 cups Whole Milk and ½ cup Heavy Cream, whisking constantly to prevent lumps.

Bring the mixture to a gentle simmer over medium heat and cook for 3-4 minutes until it thickens enough to coat the back of a spoon. Stir in the 1 tbsp Fresh Thyme Leaves, 1 tbsp Fresh Rosemary, remaining 1 tsp Salt, and 1 tsp Black Pepper. This builds the herb-forward, creamy base that defines the dish.

Step 4: Assemble and Bake the Casserole

In a large bowl, combine the cooked wild rice, chicken, mushroom sauce, and ½ cup Shredded Parmesan Cheese. Stir until everything is evenly coated. Transfer the mixture to a greased 9×13-inch baking dish.

Bake at 375°F for 20-25 minutes until the top is golden brown and the edges are bubbly. Let it rest for 5 minutes before serving—this allows the layers to set and makes it easier to serve neat portions.

Make-Ahead Tips for This chicken and wild rice casserole

Overnight Assembly

Prepare the entire casserole up to the baking step, then cover tightly with plastic wrap and refrigerate for up to 24 hours. I often assemble this after dinner the night before—a real timesaver for busy mornings. 💡

Morning Prep

If baking straight from the fridge, add 10-15 minutes to the cooking time. Let it sit at room temperature for 20 minutes while your oven preheats to 375°F. This prevents thermal shock to your dish.

Freezer-Friendly

Assemble the casserole in a freezer-safe dish, wrap tightly with aluminum foil, and freeze for up to 3 months. Thaw in the fridge overnight before baking. I always label with the date to keep track.

Partial Prep

Cook the rice and sauce up to 2 days ahead, storing them separately in airtight containers. Assemble and bake the day of serving. This method keeps the rice from getting mushy.

Reheating Leftovers

Portion leftovers into microwave-safe containers and reheat on 70% power for 2-3 minutes, stirring halfway. Add a splash of chicken broth to restore the creamy texture. ❄️

Pro Tip

Underbake the casserole slightly if making ahead—it will finish cooking during reheating. Look for a light golden top rather than deep brown when pulling it from the oven early.

Frequently Asked Questions