Name: Philly Cheese Steak Casserole
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Cuisine: American
Ingredients: 1 lb thinly sliced beef (ribeye or sirloin recommended); 1 cup bell peppers (mixed green, red, and/or yellow), sliced; 1 cup onions, sliced; 2 cloves garlic, minced; 2 tbsp olive oil or butter; Salt and pepper, to taste; 1 tbsp Worcestershire sauce; 6-8 slices provolone cheese or 1 cup shredded provolone; 1 cup shredded mozzarella cheese; 4 oz cream cheese or creamy cheese base; Optional: bread or hoagie rolls for serving

This Philly Cheese Steak Casserole is a hearty and comforting dish that combines tender slices of beef, sautéed peppers and onions, and melty cheese all baked together in a savory casserole. It’s a great way to enjoy all the classic flavors of a Philly cheesesteak sandwich in an easy, family-friendly meal.

Why You’ll Love This Recipe

I love this recipe because it’s a simple twist on a classic favorite. Instead of assembling individual sandwiches, everything comes together in one dish, which makes it perfect for busy weeknights. The layers of seasoned beef, sweet peppers, and gooey cheese are incredibly satisfying, and it’s a crowd-pleaser every time I make it. Plus, it reheats well, so it’s perfect for leftovers.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

Thinly sliced beef (such as ribeye or sirloin)
Bell peppers (a mix of green, red, or yellow)
Onions
Garlic
Olive oil or butter
Salt and pepper
Worcestershire sauce
Provolone cheese slices or shredded provolone
Mozzarella cheese
Cream cheese or a creamy cheese base
Bread or hoagie rolls (optional, if you want to serve it like a sandwich casserole)

Directions

Preheat the oven to 350°F (175°C).
In a large skillet, heat olive oil or butter over medium-high heat. Add thinly sliced onions and bell peppers, cooking until they’re soft and caramelized. Remove from skillet and set aside.
In the same skillet, add the thinly sliced beef seasoned with salt, pepper, and a splash of Worcestershire sauce. Cook until browned and tender.
Stir the sautéed peppers and onions back into the skillet with the beef. Add minced garlic and cook for another minute until fragrant.
In a baking dish, spread a layer of cream cheese or a creamy cheese base. Add the beef and pepper mixture evenly on top.
Cover the top with a generous layer of provolone and mozzarella cheese.
Bake for about 20-25 minutes, until the cheese is melted and bubbly.
Let the casserole rest for a few minutes before serving.

Servings and Timing

This casserole serves about 6 people. Prep time is around 15 minutes, and cooking plus baking takes approximately 35 minutes, making it a total of about 50 minutes from start to finish.

Variations

I sometimes switch up the cheese—using cheddar or even a spicy pepper jack adds a different twist. You can also add mushrooms or jalapeños if you like a bit more flavor or heat. For a low-carb version, I skip the bread entirely and serve it with a side of steamed vegetables or a fresh salad.

Storage/Reheating

I store leftovers in an airtight container in the refrigerator for up to 3 days. To reheat, I cover the casserole with foil and warm it in the oven at 350°F until heated through, or I use the microwave for a quicker option, stirring occasionally to heat evenly.

FAQs

What kind of beef works best for Philly Cheese Steak Casserole?

I prefer thinly sliced ribeye or sirloin because they cook quickly and stay tender, but any thin cut of beef will work fine.

Can I make this casserole ahead of time?

Yes, you can prepare it up to the baking step, cover it, and refrigerate it for a few hours or overnight. Then bake it fresh when ready.

Is it possible to freeze the casserole?

Absolutely. After baking, let it cool completely, then freeze in an airtight container for up to 2 months. Reheat in the oven for best results.

Can I use other cheeses besides provolone?

Yes! Cheddar, mozzarella, or pepper jack are all delicious alternatives that give the casserole a different flavor profile.

How can I make this recipe gluten-free?

Simply omit the bread or replace it with gluten-free bread if you want to keep that sandwich element. The casserole itself is naturally gluten-free if you check the labels on your Worcestershire sauce and other ingredients.

Conclusion

Making Philly Cheese Steak Casserole is one of my favorite ways to enjoy a classic sandwich in a cozy, convenient dish. It’s packed with flavor, easy to prepare, and great for feeding a family or meal prepping for the week. I’m always excited when this casserole is on the menu—it’s pure comfort food done right.