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Baked Cheesy Mushroom Casserole

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.

Ingredients

Scale

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

Instructions

  1. 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.
  2. 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.
  3. 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.
  4. 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

Keywords: baked casserole, cheesy mushroom dish, vegetarian casserole, comfort food, cheesy mushroom bake, gluten-free casserole, make-ahead casserole