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+ servings

Cheesy Mushroom Rice Casserole

Cooked rice and mushrooms are folded into a creamy herb sauce, topped with white cheddar, and baked until bubbly and golden.
Prep Time 20 minutes
Cook Time 28 minutes
Rest Time 5 minutes
Total Time 53 minutes
Course Casserole, Main Dish
Cuisine American
Servings 6 servings
Calories 452 kcal

Ingredients
  

  • 6 tablespoons unsalted butter, divided
  • 1 small onion, finely chopped
  • 8 to 10 ounces mushrooms, cleaned and roughly chopped
  • 3 tablespoons all-purpose flour
  • 2 3/4 cups whole milk, room temperature
  • 1 teaspoon dried thyme
  • 3/4 teaspoon ground nutmeg
  • 1/2 teaspoon dried sage
  • 4 cups cooked white rice
  • 1 3/4 cups grated white cheddar cheese, divided
  • Kosher salt and freshly cracked black pepper, to taste

Instructions
 

  • Preheat oven to 350°F. Grease a 9x9 casserole dish, place it on a foil-lined baking sheet, and set aside.
  • In a medium saucepan, melt 3 tablespoons butter over medium heat. Add onion and cook until softened and translucent, about 8–10 minutes.
  • Stir in mushrooms and cook until golden, about 4–5 minutes.
  • Add remaining 3 tablespoons butter, then whisk in flour to make a roux.
  • Gradually whisk in milk, 1/2 cup at a time, until incorporated and sauce is thickened.
  • Stir in thyme, nutmeg, and sage. Season with salt and pepper.
  • Remove from heat and fold in rice and 1 cup of cheddar cheese until combined.
  • Pour mixture into the prepared casserole dish and sprinkle with remaining 3/4 cup cheese.
  • Bake for 25–30 minutes, or until bubbly around the edges and golden on top. Serve warm.

Notes

Use a mix of mushrooms for extra depth of flavor. Can be prepared ahead of time and baked before serving.

Nutrition

Serving: 1servingsCalories: 452kcalCarbohydrates: 41.2gProtein: 15.2gFat: 24.8gSaturated Fat: 15.2gTrans Fat: 0.8gCholesterol: 69mgSodium: 510mgFiber: 1.8gSugar: 5g
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