If you are craving all the bold, savory flavors of a classic sandwich in a comforting, family-friendly dish, this Philly Cheesesteak Casserole Recipe is exactly what you need. It takes that irresistible combination of tender beef, sautéed peppers, onions, and mushrooms, then folds in creamy cheeses and a rich sauce for a warm, cheesy casserole that’s perfect any night of the week. Whether you’re serving up a cozy dinner for your family, bringing a dish to a potluck, or just want something hearty and satisfying, this casserole hits all the right notes and fills your kitchen with the most inviting aroma.

Ingredients You’ll Need

The image shows a rectangular glass baking dish filled with a baked casserole. The top layer is a golden-brown melted cheese with browned spots, melted smoothly over the surface. Beneath the cheese, there are pieces of browned meat and visible red and green bell pepper slices, scattered evenly throughout. The dish appears thick with layers of cooked ingredients, giving a slightly bubbly and textured look. The glass dish is placed on a white marbled surface that contrasts softly with the warm colors of the casserole. Photo taken with an iphone --ar 4:5 --v 7

This Philly Cheesesteak Casserole Recipe relies on simple ingredients that combine to create layers of flavor, color, and texture. Each component plays an essential role—from juicy ground beef to creamy cheeses and vibrant vegetables—making the dish both delicious and visually appealing.

1 lb ground beef (or shaved steak): The protein base that brings meaty richness and hearty texture.
1 tbsp olive oil: Helps to sauté the meat and vegetables without overpowering their natural flavors.
1 medium onion, diced: Adds sweetness and depth to the savory profile.
1 green bell pepper, diced: For fresh, slightly bitter crunch and vibrant color.
1 red bell pepper, diced: Offers a sweet contrast and brightens the dish visually.
8 oz white mushrooms, sliced: Brings umami richness and earthiness to the casserole.
2 cloves garlic, minced: Lends a fragrant and punchy flavor boost.
1 tsp salt: To enhance and balance the flavors throughout.
½ tsp black pepper: Gives a gentle heat that complements the beef and vegetables.
1 tsp Worcestershire sauce: Adds tangy, savory depth and complexity.
8 oz cream cheese, softened: Creates a luscious, creamy texture in the sauce.
½ cup beef broth: Keeps the mixture moist and adds savory notes.
1 cup shredded mozzarella cheese: Melts beautifully for gooey, cheesy goodness.
1 cup shredded provolone cheese: Elevates the dish with its mild, rich flavor.
½ tsp dried oregano: Sprinkled over the casserole for a touch of herbal aroma.
Optional: chopped parsley for garnish: Adds fresh color and a hint of brightness when serving.

How to Make Philly Cheesesteak Casserole Recipe

Step 1: Preheat Your Oven

Start by heating your oven to 375°F (190°C). Getting the oven ready early means you can slide your casserole in as soon as everything is assembled, locking in all those savory flavors and melty cheese magic.

Step 2: Cook the Meat

In a large skillet over medium-high heat, warm the olive oil and add your ground beef. Cook the meat until it’s nicely browned, breaking it apart with a spoon as it cooks to ensure even browning. Drain any excess grease for a leaner casserole, but keep enough to carry plenty of flavor into the next steps.

Step 3: Sauté the Vegetables

Next, toss in the diced onion, green and red bell peppers, and sliced mushrooms. Sauté them for 5 to 6 minutes until they’re tender and fragrant, which gives the casserole a wonderful depth. Stir in the minced garlic and cook for another minute, allowing its aroma to bloom beautifully.

Step 4: Season and Simmer

Add salt, pepper, Worcestershire sauce, and beef broth to the skillet. Stir well and let it simmer gently for 2 to 3 minutes. This step helps the flavors meld together and the broth infuses a subtle juiciness throughout.

Step 5: Make It Creamy

Turn the heat down to low and stir in the softened cream cheese, stirring until it’s fully melted and incorporated. This creates a rich, velvety sauce that ties the beef and vegetables together, making every bite satisfyingly silky.

Step 6: Assemble the Casserole

Transfer your hearty meat and veggie mixture into a lightly greased 9×13-inch baking dish. Evenly sprinkle the shredded mozzarella and provolone cheese on top, followed by a dusting of dried oregano. This cheesy layer is what makes this dish feel indulgent and comforting.

Step 7: Bake to Perfection

Place the casserole in your preheated oven and bake uncovered for 15 to 20 minutes. You want the cheese to melt fully and become bubbly with a slight golden hue—this is when the magic really happens, transforming simple ingredients into a mouthwatering masterpiece.

Step 8: Final Touches

Once baked, garnish the casserole with freshly chopped parsley if you like. This adds just the right pop of color and a mild, fresh flavor to balance the richness. Then, serve your Philly Cheesesteak Casserole hot for maximum comfort and satisfaction.

How to Serve Philly Cheesesteak Casserole Recipe

A white rectangular baking dish filled with a layered cheesy casserole. The top layer is golden-brown melted cheese with a slightly burnt, crispy texture, sprinkled with chopped green herbs. Below the cheese, there are visible layers of creamy white cheese stretching as a woman's hand lifts a large scoop, revealing chunks of browned ground meat and small pieces of red bell pepper in a creamy sauce. The casserole is set on a white marbled surface, capturing the rich, gooey texture of the dish. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

While the casserole shines on its own, adding a sprinkle of fresh parsley, chopped scallions, or even a dash of crushed red pepper flakes can brighten the flavors and add a lovely visual contrast. These simple garnishes elevate the presentation and give you extra layers of flavor with every bite.

Side Dishes

This casserole pairs wonderfully with a crisp green salad dressed lightly in lemon vinaigrette, or some garlic butter roasted vegetables to complement the richness. For a more filling meal, serve with crusty bread to soak up every bit of that cheesy sauce or a side of steamed rice to anchor the bold flavors.

Creative Ways to Present

Try serving this Philly Cheesesteak Casserole family-style in a rustic casserole dish for casual get-togethers, or portion it out into individual ramekins for an elegant touch at dinner parties. You can also adapt the recipe to stuff bell peppers or top baked potatoes for a fun twist that still delivers that iconic Philly cheesesteak taste.

Make Ahead and Storage

Storing Leftovers

Leftover Philly Cheesesteak Casserole should be cooled to room temperature before transferring to an airtight container. Stored in the refrigerator, it will stay fresh and flavorful for up to 3 days, making it a perfect make-ahead meal for busy weeknights.

Freezing

This casserole freezes beautifully. Just assemble in a freezer-safe dish, cover tightly with foil or plastic wrap, and freeze for up to 2 months. When you’re ready, thaw overnight in the fridge before baking to reheat. Freezing does not compromise the texture or flavor, so you can enjoy your Philly Cheesesteak Casserole Recipe anytime.

Reheating

Reheat individual portions in the microwave for 2 to 3 minutes until warm, or reheat the whole casserole in a 350°F (175°C) oven for 15 to 20 minutes, covered with foil to prevent drying out. Adding a few minutes uncovered at the end will refresh that melty cheesy top perfectly.

FAQs

Can I use shaved steak instead of ground beef in this casserole?

Absolutely! Shaved steak works wonderfully and brings an authentic Philly cheesesteak texture. Just cook it until browned and tender before combining it with the veggies and cheese.

What cheeses work best in the Philly Cheesesteak Casserole Recipe?

Mozzarella and provolone are classics and melt beautifully. You can also experiment with a bit of cheddar for a sharper flavor or Monterey Jack for extra creaminess.

Is this casserole spicy?

By default, it’s mild and focused on savory, cheesy flavors. If you love a little heat, consider adding a pinch of crushed red pepper flakes when sautéing the veggies or as a garnish.

Can I prepare this casserole ahead of time?

Yes! You can assemble everything the day before, keep it covered in the fridge, and bake it fresh when ready. This makes weeknight dinners so much easier.

What can I serve with this Philly Cheesesteak Casserole Recipe to make a complete meal?

A simple green salad, steamed veggies, or even roasted potatoes all complement this casserole nicely, balancing the richness and adding freshness or extra texture.

Final Thoughts

I can’t recommend this Philly Cheesesteak Casserole Recipe enough if you want a cozy, impressive dinner that’s packed with all the iconic flavors of the Philly cheesesteak but easier to share and serve. It’s comforting, cheesy, and makes your whole kitchen smell like home. Give it a try, and I promise it’ll quickly become one of your go-to recipes!