Creamy Mushroom Beef Casserole

 

Creamy Mushroom Beef Casserole is the ultimate comfort food, combining seasoned ground beef, tender mushrooms, a rich and creamy sauce, and melted cheese in every bite. This hearty casserole is perfect for family dinners, meal prep, potlucks, or cozy weeknight meals. The savory flavors of beef and mushrooms blend beautifully with the creamy sauce, while the cheesy topping creates a delicious golden finish. Easy to prepare and incredibly satisfying, this casserole is sure to become a regular favorite in your meal rotation.

Ingredients For the Beef and Mushroom Mixture

• 1 lb (450g) ground beef
• 1 tbsp olive oil
• 1 small onion, diced
• 3 garlic cloves, minced
• 8 oz (225g) mushrooms, sliced
• 1 tsp salt
• ½ tsp black pepper
• 1 tsp Italian seasoning

For the Creamy Sauce

• 1 can (10.5 oz) cream of mushroom soup
• 1 cup sour cream
• ½ cup beef broth
• 1 tbsp Worcestershire sauce

For the Casserole

• 3 cups cooked egg noodles
• 1½ cups shredded mozzarella cheese
• ½ cup shredded cheddar cheese

For Garnish

• 2 tbsp fresh parsley, chopped

Step-by-Step Instructions

Step 1: Prepare the Oven

Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish and set it aside.

Step 2: Cook the Aromatics

Heat olive oil in a large skillet over medium heat. Add the diced onion and cook for about 3 minutes until softened. Stir in the minced garlic and cook for another 30 seconds until fragrant.

Step 3: Brown the Beef

Add the ground beef to the skillet. Cook for 6–8 minutes, breaking it apart with a spoon, until fully browned. Drain any excess grease if needed.

Step 4: Cook the Mushrooms

Add the sliced mushrooms to the beef mixture. Cook for 5–6 minutes, stirring occasionally, until the mushrooms become tender and release their moisture.

Step 5: Season the Mixture

Sprinkle in the salt, black pepper, and Italian seasoning. Stir well to distribute the seasonings evenly throughout the beef and mushrooms.

Step 6: Make the Creamy Sauce

In a medium bowl, whisk together the cream of mushroom soup, sour cream, beef broth, and Worcestershire sauce until smooth and creamy.

Pour the sauce into the skillet with the beef mixture. Stir until everything is fully coated and heated through, about 2–3 minutes.

Step 7: Combine with Noodles

Place the cooked egg noodles in a large mixing bowl. Add the creamy beef and mushroom mixture and gently stir until the noodles are evenly coated.

Step 8: Assemble the Casserole

Transfer the mixture to the prepared baking dish and spread it into an even layer.

Step 9: Add the Cheese

Sprinkle the mozzarella cheese and cheddar cheese evenly over the top.

Step 10: Bake

Bake uncovered for 20–25 minutes, or until the cheese is melted, bubbly, and lightly golden around the edges.

Step 11: Rest and Serve

Remove the casserole from the oven and allow it to rest for 5 minutes before serving. Garnish with chopped parsley for a fresh finish.

Tips, Notes & Q&A

Tips

• Use freshly sliced mushrooms for the best texture and flavor.
• For extra richness, substitute half of the beef broth with heavy cream.
• Add peas or spinach for additional vegetables and color.
• Shred your own cheese for better melting and flavor.

Note

Allowing the casserole to rest before serving helps it set properly and makes it easier to portion.

Q: Can I make this casserole ahead of time?

Yes. Assemble the casserole up to 24 hours in advance, cover, and refrigerate. Bake when ready to serve.

Q: Can I freeze it?

Yes. Wrap tightly and freeze for up to 3 months. Thaw overnight in the refrigerator before baking.

Q: How should leftovers be stored?

Store leftovers in an airtight container in the refrigerator for up to 4 days.

Servings & Nutrition

Servings: 6 servings

Approximate Nutrition Per Serving

• Calories: 490
• Protein: 30g
• Carbohydrates: 28g
• Fat: 29g
• Saturated Fat: 13g
• Fiber: 2g
• Sugar: 3g
• Sodium: 760mg

Creamy Mushroom Beef Casserole is a warm, satisfying, and family-friendly meal packed with savory beef, tender mushrooms, creamy sauce, and gooey melted cheese. Whether served for a weeknight dinner or prepared ahead for meal prep, this comforting casserole delivers rich flavor and hearty goodness in every bite.