Wild Rice and Mushroom Casserole

Creamy Wild Rice and Mushroom Casserole is an easy baked casserole that is packed with flavor! Enjoy it for dinner on its own or serve it as a side dish with your favorite meal.

This post is sponsored by Campbell’s®. As always, all opinions are my own.

a spoon sitting in a dish of cooked mushroom and wild rice casserole

Rice casserole is a great choice for dinner. It’s hearty, filling and delicious. It works great for gatherings, holidays or even for dinner during the week.

To save time and add more flavor, this recipe uses one can of Campbell’s® Cream of Mushroom Soup. Campbell’s® is a brand that everyone recognizes and the condensed soup is a staple in our kitchen. It’s a convenient mix-in for a variety of recipes. Mix together the mushroom soup with fresh mushrooms, rice, spices and a creamy sauce.

Ingredients You Need

ingredients for mushroom and wild rice casserole
  • Mushrooms – Cremini mushrooms, baby belle mushrooms or sliced button mushrooms work great in casserole.
  • Onion – Fresh yellow onion adds the best flavor.
  • Wild Rice – A wild rice blend tastes the best.
  • Campbell’s® Cream of Mushroom Soup – The soup is packed with flavor and creamy goodness.
  • Vegetable Broth – This helps thin out the sauce and add even more flavor.
  • Heavy Cream – You can substitute with half and half, if needed.
  • Cheese – This recipe uses a combo of shredded Mozzarella cheese and Parmesan cheese to create a rich and creamy dish.
  • Fresh Spices and Herbs – Garlic, thyme, rosemary, salt and pepper. Use fresh for the best flavor.
  • Olive Oil – This is needed to sauté the onions and mushrooms.
mixing together ingredients for wild rice casserole in a pan

Expert Tips

  1. Cook the rice in advance. You can do this up to 2 days before making the casserole. To yield 3 cups of cooked wild rice, you will need about 1 1/4 cup of uncooked rice.
  2. Use fresh herbs for the best flavor. You will not get the same result with dried herbs.
  3. Bake the casserole in a 3-quart dish. You can use a rectangular, square or oval dish for baking.
  4. Prep ahead: You can prep this casserole up to 1 day in advance. Prepare the casserole through step 4. After adding the cheese, cover and place in the refrigerator until you are ready to bake.
  5. Don’t skip the broiling. Broil the casserole for up to 5 minutes after baking to achieve that nice golden crust on the top.
  6. Serve the rice on its own for a full meal or as a side dish.

Freezing Wild Rice Casserole

To freeze this baked casserole, portion it out in freezer safe zipped-top bags or freezer safe containers. Squeeze out as much air as possible. Store in the freezer for up to 3 months. Thaw and reheat prior to serving.

To reheat, place the casserole in an oven safe dish. Reheat at 325 degrees F for 20 to 30 minutes, or until the rice is heated through.

baked wild rice casserole sitting on a white table with a can of cream of mushroom soup

Homemade wild rice and mushroom casserole is the perfect comfort food. It’s packed with plenty of flavor and is a tasty meal that feeds your entire family. Try it and let us know what you think!

What to Serve with Rice Casserole

a big spoonful of mushroom wild rice casserole

Wild Rice and Mushroom Casserole

Yield: 8 servings
Prep Time: 10 minutes
Cook Time: 30 minutes
Total Time: 40 minutes
This delicious casserole is the perfect side dish!
5 from 12 votes


  • 1 tablespoon extra virgin olive oil
  • 1 medium yellow onion, freshly chopped
  • 8 ounces mushrooms, sliced
  • 2 cloves garlic, minced
  • 1/2 teaspoon fresh thyme leaves
  • 1/2 teaspoon fresh rosemary, chopped
  • 1/2 teaspoon kosher salt
  • 1/4 teaspoon cracked black pepper
  • 3 cups cooked wild rice blend
  • 10.5 ounces Campbell's® Cream of Mushroom Soup, (1 can)
  • 1/2 cup vegetable broth
  • 1/2 cup heavy cream
  • 1/3 cup Mozzarella cheese, shredded
  • 3/4 cup Parmesan cheese, shredded


  • Preheat oven to 350 degrees F. Spray the inside of a 3-quart casserole dish with cooking spray; set aside.
  • Heat olive oil in a large skillet set over medium-low heat. Add onion and saute 4 to 5 minutes, or until onion is soft and translucent.
  • Add sliced mushrooms, cooking for 6 to 8 minutes, or until the mushrooms are soft. Stir in garlic, thyme, and rosemary, salt, and pepper; cook for 1 minute.
  • Remove skillet from heat and stir in the cooked wild rice, soup, broth, and heavy cream. Stir until well combined. Lastly, add shredded Mozzarella cheese, stirring to incorporate.
  • Transfer mixture to prepared baking dish and cover with foil. Bake for 20 to 30 minutes or until bubbling. 
  • Remove the casserole, remove the foil, and preheat broiler to high heat.
  • Sprinkle with shredded Parmesan cheese. Broil uncovered on the top rack 2 to 5 minutes until the cheese is melted and golden. Garnish with fresh herbs, if desired.


Store leftovers in the refrigerator for up to 3 days.


Calories: 216kcal, Carbohydrates: 19g, Protein: 10g, Fat: 12g, Saturated Fat: 6g, Cholesterol: 32mg, Sodium: 657mg, Potassium: 247mg, Fiber: 2g, Sugar: 2g, Vitamin A: 363IU, Vitamin C: 2mg, Calcium: 154mg, Iron: 1mg
Course: Main Course
Cuisine: American
Author: Ashley C.
If you try this recipe, don’t forget to leave a review below or share a photo and tag @spoonfulofflavor on Instagram.

6 comments on “Wild Rice and Mushroom Casserole”

  1. So good! Received lots of great comments from guests. Can you double this recipe and put in same 3 quart casserole dish for a large group?

    • I’m so glad you enjoyed. Thanks so much for your feedback! I’m not sure if you will be able to fit it all in a 3 quart dish if you double the recipe. That is a lot of rice, but you can try it. You may need to bake in two separate dishes. Enjoy!

  2. This was a hit at our annual neighborhood get together that about 60 people attended!

  3. My family loves this simple comfort food!

  4. There’s nothing better than a mushroom and thyme combo! I love this so much! Thanks for another great recipe!

  5. This is one of the easiest and great tasting casseroles with wild rice and mushrooms! This is a must try for everyone!

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