Philly Cheesesteak Casserole Recipe

Introduction

Philly Cheesesteak Casserole is a comforting, cheesy, and hearty baked dish inspired by the famous Philadelphia cheesesteak sandwich. It combines tender slices of beef, sautéed onions and bell peppers, mushrooms, and a rich blend of melted cheeses in a creamy casserole. This recipe delivers all the classic flavors of a traditional cheesesteak without the bread, making it an excellent option for weeknight dinners, meal prep, or low-carb lifestyles.

Easy to prepare and packed with savory flavor, this casserole is perfect for feeding a hungry family or serving at potlucks and gatherings. Every bite is filled with juicy beef, caramelized vegetables, and gooey melted cheese.

History

The classic Philly cheesesteak sandwich originated in Philadelphia, Pennsylvania, during the 1930s. It is widely credited to brothers Pat and Harry Olivieri, who began serving thinly sliced grilled beef on a long roll. Over time, cheese was added, and the sandwich became an American icon.

As casserole recipes gained popularity for their convenience and ability to feed families, home cooks adapted the traditional cheesesteak into a baked casserole. This version preserves the beloved flavors while eliminating the bread, making it suitable for gluten-conscious and low-carbohydrate diets.

Why You’ll Love This Recipe

Rich and cheesy
Easy one-pan meal
Family-friendly
Perfect for meal prep
High in protein
Naturally low in carbohydrates
Ready in about one hour
Great for leftovers
Easily customizable

Nutritional Information (Per Serving)

Approximate values (serves 6):

Calories: 490
Protein: 36 g
Carbohydrates: 8 g
Fat: 35 g
Saturated Fat: 15 g
Cholesterol: 120 mg
Fiber: 2 g
Sugar: 4 g
Sodium: 720 mg
Calcium: 25% Daily Value
Iron: 20% Daily Value

Ingredients

For the Casserole

2 pounds (900 g) thinly sliced ribeye steak or sirloin
2 tablespoons olive oil
1 large onion, thinly sliced
2 green bell peppers, sliced
8 ounces (225 g) mushrooms, sliced
3 cloves garlic, minced
1 teaspoon salt
1 teaspoon black pepper
1 teaspoon smoked paprika
½ teaspoon onion powder
½ teaspoon garlic powder

Cheese Mixture

8 ounces (225 g) cream cheese, softened
½ cup sour cream
1 tablespoon Dijon mustard
1 tablespoon Worcestershire sauce

Topping

2 cups shredded provolone cheese
1 cup shredded mozzarella cheese
½ cup grated Parmesan cheese
Fresh parsley, chopped

Equipment

Large skillet
Mixing bowls
9×13-inch baking dish
Wooden spoon
Measuring cups and spoons
Cheese grater
Aluminum foil (optional)

Instructions

Step 1: Prepare the Oven

Preheat the oven to 375°F (190°C).

Lightly grease a 9×13-inch baking dish.

Step 2: Cook the Vegetables

Heat olive oil in a large skillet.

Cook the onions for about 5 minutes until softened.

Add the bell peppers and mushrooms.

Cook for another 5–7 minutes.

Stir in the garlic and cook for 1 minute.

Transfer the vegetables to a bowl.

Step 3: Cook the Beef

Using the same skillet, cook the sliced beef over medium-high heat.

Season with:

Salt
Pepper
Smoked paprika
Garlic powder
Onion powder

Cook until browned, about 5–7 minutes.

Drain excess liquid if necessary.

Step 4: Make the Creamy Mixture

In a bowl combine:

Cream cheese
Sour cream
Dijon mustard
Worcestershire sauce

Mix until smooth.

Step 5: Assemble

Combine:

Cooked beef
Vegetables
Cream cheese mixture

Mix thoroughly.

Spread evenly into the prepared baking dish.

Step 6: Add Cheese

Top evenly with:

Provolone
Mozzarella
Parmesan

Step 7: Bake

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

Step 8: Rest

Allow the casserole to rest for 10 minutes before serving.

Garnish with chopped parsley.

Different Cooking Methods

Classic Oven Method

Bake until golden and bubbly.

Low-Carb Version

Serve as written without bread.

Pasta Version

Mix cooked penne or rotini into the casserole before baking.

Rice Version

Stir in cooked rice for a heartier meal.

Potato Version

Layer thinly sliced potatoes beneath the meat mixture.

Spicy Version

Add sliced jalapeños or crushed red pepper flakes.

Mushroom Lover’s Version

Double the mushrooms for extra earthy flavor.

Slow Cooker Version

Cook the beef and vegetables first, combine all ingredients in a slow cooker, and cook on low for 2–3 hours.

Tips for Success

Freeze the steak for 20–30 minutes before slicing for thinner pieces.
Use freshly shredded cheese for the best melting quality.
Avoid overcooking the beef to keep it tender.
Drain excess liquid from vegetables before assembling.
Let the casserole rest before serving for easier slicing.

Serving Suggestions

Serve with:

Garlic bread
Roasted broccoli
Caesar salad
Green beans
Coleslaw
Mashed potatoes
French fries
Steamed asparagus
Roasted Brussels sprouts

Storage

Refrigerate in an airtight container for up to 4 days.
Freeze for up to 3 months.
Reheat in a 350°F (175°C) oven for 15–20 minutes or microwave individual portions until hot.

Why People Love Philly Cheesesteak Casserole

This casserole is loved because it captures the rich, savory flavors of a classic Philly cheesesteak in a convenient baked dish. The combination of tender beef, sweet onions, peppers, mushrooms, creamy sauce, and melted cheese creates a satisfying meal that’s comforting, filling, and easy to prepare. It’s also versatile enough to be enjoyed on its own or paired with your favorite side dishes.

Conclusion

Philly Cheesesteak Casserole transforms the iconic sandwich into a delicious oven-baked meal that’s perfect for family dinners, meal prep, and entertaining. With tender beef, flavorful vegetables, a creamy cheese mixture, and a golden cheesy topping, this recipe is both comforting and impressive. Whether you’re following a low-carb lifestyle or simply looking for a hearty casserole, this dish is sure to become a favorite that everyone will ask for again.