Philly Cheesesteak Casserole

All the bold, cheesy flavor of the classic hoagie — baked into a hearty, one-pan casserole that’s perfect for busy weeknights or game day gatherings.

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Introduction

When you’re craving a classic Philly cheesesteak — thin-sliced ribeye, sweet peppers and onions, gooey melted cheese — but don’t want to stand at the stove assembling sandwiches for a crowd, this Philly Cheesesteak Casserole is the answer.

It’s everything you love about the sandwich, deconstructed and baked into a comforting, cheesy, fork-friendly dish. Juicy, seasoned beef. Caramelized onions and bell peppers. A creamy, savory sauce. And of course — two layers of melted cheese for that irresistible pull.

No hoagie rolls? No problem. This casserole skips the bread but delivers all the rich, savory goodness you expect from a Philly favorite. It’s also endlessly adaptable — you can add mushrooms, spice it up, or serve it spooned into toasted buns for a “cheesesteak sloppy joe” vibe.

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Why You’ll Love This Casserole

• Packed with flavor – Just like a real Philly cheesesteak, without the mess
• Cheesy and comforting – A double layer of provolone and mozzarella delivers melt-in-your-mouth richness
• Quick and easy – A stovetop sauté followed by a quick oven bake
• Crowd-pleaser – Perfect for family dinners, potlucks, or meal prep
• Customizable – Add mushrooms, hot peppers, or different cheeses to make it your own
• Low-carb option – No bread required (unless you want it!)

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Ingredients

For the Beef & Veggies

• 1½ to 2 pounds thinly sliced ribeye steak or shaved beef (can also use ground beef in a pinch)
• 2 tablespoons olive oil, divided
• 1 large yellow onion, thinly sliced
• 2 bell peppers (green, red, or both), thinly sliced
• 2–3 cloves garlic, minced
• 1 teaspoon Worcestershire sauce (optional, for depth)
• ½ teaspoon smoked paprika or steak seasoning (optional)
• Salt and black pepper to taste

For the Cheese Sauce

• 4 ounces cream cheese, softened
• ½ cup heavy cream or whole milk
• 1 teaspoon Dijon mustard (optional)
• 1 cup shredded mozzarella cheese

For the Casserole

• 6 to 8 slices provolone cheese (or more to cover the top)
• Optional toppings: chopped parsley, sliced jalapeños, sautéed mushrooms, crispy onions

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Instructions

Step 1: Cook the Steak

1. Heat 1 tablespoon olive oil in a large skillet over medium-high heat.
2. Add the ribeye or shaved beef. Season with salt, pepper, paprika, and Worcestershire sauce.
3. Cook until browned and just cooked through, about 4–6 minutes. Remove from pan and set aside.

Step 2: Sauté the Vegetables

1. In the same skillet, add remaining olive oil.
2. Sauté sliced onions and peppers until soft and lightly caramelized, about 8–10 minutes.
3. Add garlic and cook for 1 more minute.
4. Return the cooked beef to the pan and toss everything together.

Step 3: Make the Cheese Sauce

1. In a separate small saucepan over low heat, combine cream cheese, cream (or milk), and Dijon mustard. Stir until smooth.
2. Add shredded mozzarella and stir until melted and creamy.
3. Pour this cheese sauce over the beef and veggie mixture. Mix well to coat everything.

Step 4: Assemble and Bake

1. Preheat oven to 375°F (190°C).
2. Lightly grease a 9×13-inch baking dish.
3. Pour the cheesesteak mixture into the dish and spread into an even layer.
4. Top with provolone cheese slices to fully cover the surface.
5. Bake uncovered for 15–20 minutes, or until cheese is melted and bubbly with golden spots.
6. Let rest for 5 minutes before serving.

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Optional Add-Ins

• Sautéed mushrooms – for a richer umami profile
• Hot peppers or jalapeños – for heat lovers
• Pickled banana peppers – to mimic a classic cheesesteak topping
• Diced roasted garlic or onions – for extra depth
• Bread topping – sprinkle with buttered breadcrumbs before baking for a crispy crust

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Make-Ahead & Storage

• Make-ahead: Assemble the casserole (without baking) and refrigerate up to 24 hours. Add 5–10 minutes to bake time if cooking from cold.
• Store: Refrigerate leftovers in an airtight container for up to 4 days.
• Freeze: Freeze baked casserole for up to 2 months. Thaw overnight and reheat in oven.
• Reheat: Warm leftovers in a 300°F oven until heated through, or microwave individual servings.

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Serving Suggestions

• Serve as a standalone casserole with fries, chips, or a side salad
• Spoon into toasted hoagie rolls for a sandwich-style experience
• Pair with pickles, hot sauce, or coleslaw for contrast
• Add a side of roasted potatoes or sautéed green beans for a full meal

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Final Thoughts

This Philly Cheesesteak Casserole is comfort food at its best — hearty, cheesy, and packed with flavor. It brings all the satisfaction of a classic sandwich in a format that’s easier to make, serve, and share. Whether you’re feeding a hungry family or just want a new twist on a favorite dish, this casserole is sure to earn a spot in your regular rotation.