Baked Cheesy Mushroom Casserole
Baked Cheesy Mushroom Casserole is a creamy, comforting dish featuring tender mushrooms baked in a luscious cheese sauce with a golden, crunchy topping. This versatile casserole is perfect for family dinners or gatherings, combining rich flavors and satisfying textures that delight both cheese and mushroom lovers alike.
- Author: Kaeli
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 6 servings 1x
- Category: Appetizers
- Method: Baking
- Cuisine: American
- Diet: Gluten Free
Mushroom Mixture
- 1 lb fresh mushrooms (button, cremini, or mixed), cleaned and sliced
- 2 tablespoons butter
- 2 cloves garlic, minced
- 1 small onion, diced
Cheese Sauce
- 3 tablespoons butter
- 3 tablespoons all-purpose flour (or gluten-free flour alternative)
- 1 ½ cups milk or cream
- 1 cup shredded cheddar cheese
- ½ cup sour cream or cream cheese
Toppings & Seasonings
- ½ cup breadcrumbs or crushed crackers (use gluten-free if needed)
- Additional shredded cheddar cheese for topping (about ¼ cup)
- Salt and black pepper to taste
- 2 tablespoons fresh parsley or thyme, chopped
- Prepare the Mushrooms: Clean and slice mushrooms evenly. In a large skillet, sauté mushrooms with butter, minced garlic, and diced onion over medium heat until mushrooms release moisture and become tender and fragrant.
- Make the Cheese Sauce: In a separate saucepan, melt butter and whisk in flour to form a roux. Gradually add milk or cream while whisking continuously to prevent lumps. Cook until thickened, then stir in shredded cheddar cheese and sour cream or cream cheese until smooth and creamy.
- Combine Ingredients: Gently mix the sautéed mushrooms and onions into the cheese sauce. Season with salt, pepper, and fresh herbs, ensuring all pieces are well coated.
- Assemble and Bake: Transfer the mixture into a greased baking dish. Sprinkle breadcrumbs or crushed crackers evenly on top, followed by an extra sprinkling of cheddar cheese. Bake in a preheated oven at 350°F (175°C) for 25-30 minutes, until bubbly and golden brown on top.
Notes
- Use fresh mushrooms for best texture and flavor compared to canned or frozen.
- Don’t skip making the roux; it prevents lumps and ensures a smooth cheese sauce.
- Sauté mushrooms thoroughly to avoid excess moisture making the casserole watery.
- Allow the casserole to rest for a few minutes after baking to set for easier serving.
- Customize toppings with toasted nuts or crispy fried onions for extra texture.
Nutrition
- Serving Size: 1/6 of casserole
- Calories: 320
- Sugar: 3g
- Sodium: 420mg
- Fat: 22g
- Saturated Fat: 13g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 15g
- Fiber: 2g
- Protein: 14g
- Cholesterol: 65mg
Keywords: baked casserole, cheesy mushroom dish, vegetarian casserole, comfort food, cheesy mushroom bake, gluten-free casserole, make-ahead casserole