Cheesy Beef and Mushroom Casserole (Ultimate Comfort Food Dinner)
Description: A Cozy, Cheesy, Crowd-Pleasing Casserole
If you’re looking for the ultimate comfort food casserole, this Cheesy Beef and Mushroom Casserole is exactly what you need. Loaded with savory ground beef, tender mushrooms, sweet green bell peppers, and a rich, creamy cheese sauce, this baked dish is warm, filling, and incredibly satisfying. Every bite delivers layers of flavor, making it one of those easy dinner recipes that quickly becomes a family favorite.
This casserole is perfect for busy weeknight dinners, meal prep, or even potluck gatherings. It’s budget-friendly, customizable, and uses simple pantry ingredients that most home cooks already have on hand. The golden, bubbly cheese topping creates a visually irresistible finish that makes this dish feel indulgent while still being practical.
Whether you’re feeding a hungry family or looking for a hearty meal to reheat throughout the week, this recipe delivers comfort, convenience, and classic flavor in one baking dish.
Why This Recipe Works
This recipe succeeds because it balances:
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Protein from ground beef
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Umami flavor from mushrooms
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Freshness and sweetness from green bell peppers
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Creamy richness from cheese and sauce
It’s also a great alternative to pasta-heavy casseroles, making it appealing to those searching for low-carb dinner ideas or high-protein meals (with easy adaptations).
Ingredients (Serves 6–8)
Main Ingredients
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1 ½ pounds ground beef (80/20 recommended)
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2 cups sliced mushrooms (white or cremini)
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1 large green bell pepper, diced
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1 small onion, finely chopped
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2 cloves garlic, minced
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1 teaspoon salt
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½ teaspoon black pepper
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1 teaspoon paprika
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½ teaspoon Italian seasoning
Creamy Sauce
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1 can (10.5 oz) cream of mushroom soup
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½ cup sour cream
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¼ cup milk or heavy cream
Cheese Topping
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1 ½ cups shredded cheddar cheese
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1 cup shredded mozzarella cheese
Optional Additions
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½ teaspoon red pepper flakes (for heat)
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1 tablespoon Worcestershire sauce (for depth)
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Fresh parsley for garnish
Step-by-Step Instructions
Step 1: Preheat and Prepare
Preheat your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish and set it aside.
Step 2: Brown the Ground Beef
In a large skillet over medium heat, cook the ground beef until browned and fully cooked. Break it up as it cooks to ensure even browning. Drain excess grease if necessary.
Step 3: Sauté the Vegetables
Add the chopped onion, garlic, mushrooms, and green bell pepper to the skillet with the beef. Cook for 5–7 minutes, stirring frequently, until the vegetables are soft and fragrant.
Season the mixture with salt, pepper, paprika, and Italian seasoning. Stir well to evenly distribute the spices.
Step 4: Make the Creamy Sauce
Reduce heat to low and stir in the cream of mushroom soup, sour cream, and milk. Mix until everything is well combined and creamy. If using Worcestershire sauce or red pepper flakes, add them at this stage.
Step 5: Assemble the Casserole
Transfer the beef and vegetable mixture into the prepared baking dish, spreading it evenly. Sprinkle the cheddar and mozzarella cheeses generously over the top.
Step 6: Bake to Perfection
Bake uncovered for 25–30 minutes, or until the cheese is melted, bubbly, and lightly golden brown.
Step 7: Rest and Serve
Let the casserole rest for about 5 minutes before serving. Garnish with fresh parsley if desired.
Cooking Tips for Best Results
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Don’t overcook the mushrooms: They should be tender but not mushy.
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Shred your own cheese for better melting and flavor.
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Let it rest after baking to help the casserole set and slice cleanly.
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For extra crispiness, broil for 2–3 minutes at the end.
Recipe Variations and Substitutions
Low-Carb Version
Skip any starchy add-ins and serve with a side salad or roasted vegetables.
Keto-Friendly Option
Use full-fat sour cream and cheese, and ensure your soup is low-carb or homemade.
Make It Spicy
Add jalapeños, cayenne pepper, or hot sauce for a spicy casserole twist.
Add More Vegetables
Zucchini, spinach, or cauliflower florets work beautifully in this recipe.
Swap the Protein
Ground turkey or ground chicken can replace beef for a lighter version.
Storage and Reheating Instructions
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Refrigerator: Store leftovers in an airtight container for up to 4 days.
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Freezer: Freeze fully cooked and cooled casserole for up to 3 months.
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Reheating: Warm in the oven at 350°F or microwave individual portions.
Related Questions (High-CPM SEO FAQs)
What is the best cheese for casserole recipes?
Cheddar and mozzarella are ideal for casseroles because they melt smoothly and create a golden, bubbly topping.
Can I make this casserole ahead of time?
Yes, this is one of the best make-ahead dinner recipes. Assemble it up to 24 hours in advance and bake when ready.
Is this casserole good for meal prep?
Absolutely. It reheats well and stays flavorful, making it perfect for weekly meal planning.
What can I serve with a cheesy beef casserole?
Serve with a green salad, roasted vegetables, garlic bread, or cauliflower rice for a balanced meal.
How do I make casseroles more flavorful?
Layer seasoning, use fresh vegetables, and don’t skimp on cheese or aromatics like garlic and onion.
Are casseroles budget-friendly meals?
Yes, casseroles are among the most cost-effective family dinners, using affordable ingredients to feed many people.
Final Thoughts
This Cheesy Beef and Mushroom Casserole is everything a comfort food recipe should be: rich, satisfying, easy to prepare, and endlessly adaptable. Whether you’re searching for easy dinner ideas, comfort food classics, or family-friendly recipes, this dish checks all the boxes.
