Baked Mushroom Casserole Recipe
This hearty mushroom casserole recipe checks all of the boxes, quick, easy, and delicious, and it pairs beautifully with beef, pork or chicken. Baked Mushroom Casserole would also make a wonderful vegetarian main course for dinner.
Servings Prep Time
4servings 10minutes
Cook Time
Servings Prep Time
4servings 10minutes
Cook Time
  • 6Tbsp unsalted butterroom temperature
  • 1Tbsp chopped parsleyfresh
  • 2tsp lemon juicefresh
  • 1/2tsp kosher salt
  • 1/8tsp ground black pepper
  • 4slices French bread1/2-inch-thick (may need more to cover the bottom of baking dish)
  • 12oz mixed mushroomssliced
  • 1/2cup heavy cream
  1. Preheat your broiler to high and toast the French bread slices until they are lightly browned on both sides. Reduce the oven heat to 375 degrees F.
  2. Add the room temperature butter, parsley, lemon juice, salt, and pepper to a small bowl and mix well. Take up to half of the butter mixture and liberally spread on one side of the toast slices. Set the remaining butter mixture aside.
  3. Cover the bottom of a small shallow baking dish or gratin dish with a single layer of buttered slices of toast.
  4. Top the toast with the mushroom slices and spread out evenly.
  5. Melt the remaining butter mixture in the microwave or on the stove and drizzle over the mushrooms. Drizzle the heavy cream evenly over the mushrooms.
  6. Cover the dish tightly with foil or a lid and bake for approximately 30 minutes or until the mushrooms are done.
  7. Optional, garnish with additional chopped parsley.
  8. Serve hot!
Recipe Notes

Sharon’s Expert Tips:

  • You can use pretty much any variety of mushrooms in this casserole. I was lucky to find a mixture of prepackaged mushrooms that were already sliced at the store, but you can use just one type if that’s what you have on hand. White button mushrooms, which are the most common, would work well. Creminis, which are just baby portabellas, would also be delicious.
  • Depending on how large your loaf of French bread is, and the size of your baking dish, you might need more than four slices. Don’t jam them in, they should just fit comfortably in one layer.
  • Sliced sourdough bread can be substituted for the French bread.
  • You can substitute dried parsley flakes for the fresh parsley in this recipe. Because dried herbs are stronger than fresh only use one teaspoon of dried parsley.
Nutrition Facts
Baked Mushroom Casserole Recipe
Amount Per Serving
Calories 410 Calories from Fat 261
% Daily Value*
Total Fat 29g 45%
Saturated Fat 18g 90%
Polyunsaturated Fat 1g
Monounsaturated Fat 4g
Cholesterol 86mg 29%
Sodium 568mg 24%
Potassium 352mg 10%
Total Carbohydrates 30g 10%
Dietary Fiber 3g 12%
Sugars 2g
Protein 8g 16%
Vitamin A 21%
Vitamin C 5%
Calcium 6%
Iron 10%
* Percent Daily Values are based on a 2000 calorie diet.

Nutrition information can vary for a recipe based on factors such as precision of measurements, brands, ingredient freshness, or the source of nutrition data. We strive to keep the information as accurate as possible but make no warranties regarding its accuracy. We encourage readers to make their calculations based on the actual ingredients used in your recipe, using your preferred nutrition calculator, especially those with dietetic allergies and food-related diagnoses.