This Cheesy Philly Steak Casserole takes everything you love about a classic Philly cheesesteak and turns it into a rich, bubbly, oven-baked comfort dish. Juicy beef, tender peppers and onions, and loads of melted cheese come together in one easy casserole that’s perfect for busy weeknights or cozy family dinners.
Why You’ll Love This Recipe
- All the flavors of a Philly cheesesteak
- Extra cheesy and incredibly satisfying
- Easy to make with simple ingredients
- Perfect for meal prep or feeding a crowd
- One-pan comfort food everyone loves
Ingredients
- 1½ pounds beef sirloin or shaved steak, thinly sliced
- 1 tablespoon olive oil
- 1 large onion, sliced
- 1 green bell pepper, sliced
- 1 red bell pepper, sliced
- 2 cloves garlic, minced
- 1 teaspoon salt
- ½ teaspoon black pepper
- 1 teaspoon Italian seasoning
- 1 cup beef broth
- 1 cup heavy cream
- 8 oz cream cheese, softened
- 1½ cups shredded provolone cheese
- 1 cup shredded mozzarella cheese
- Optional: sliced mushrooms
Instructions
- Preheat the Oven
Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish. - Cook the Beef
Heat olive oil in a large skillet over medium-high heat. Add the beef and cook until browned. Remove and set aside. - Sauté the Vegetables
In the same skillet, add onions, bell peppers, and mushrooms (if using). Cook until softened, about 5–7 minutes. Add garlic and cook for 30 seconds. - Make the Sauce
Reduce the heat to medium. Stir in beef broth, heavy cream, and cream cheese. Mix until smooth and creamy. - Combine Everything
Return the beef to the skillet. Season with salt, pepper, and Italian seasoning. Stir until well coated. - Assemble the Casserole
Transfer the mixture to the prepared baking dish. Sprinkle provolone and mozzarella evenly over the top. - Bake
Bake uncovered for 20–25 minutes, until bubbly and golden on top. - Rest & Serve
Let rest for 5 minutes before serving.
Serving Suggestions
- Serve over toasted hoagie rolls
- Pair with garlic bread or dinner rolls
- Add a simple green salad on the side
- Spoon over rice or mashed potatoes
Tips for the Best Philly Steak Casserole
- Use shaved steak for the most authentic texture
- Don’t overcook the beef before baking
- Provolone gives classic Philly flavor
- Add crushed red pepper for heat
- For extra cheesiness, broil 2–3 minutes at the end
Frequently Asked Questions
Can I make this ahead of time?
Yes! Assemble, cover, and refrigerate up to 24 hours before baking.
Can I freeze it?
Yes. Freeze before baking for up to 2 months. Thaw overnight and bake as directed.
Can I make it low-carb?
Absolutely — this recipe is naturally low-carb and keto-friendly.
Final Thoughts
This Cheesy Philly Steak Casserole is rich, hearty, and packed with classic flavors the whole family will love. It’s everything you crave in a Philly cheesesteak—just easier, cheesier, and perfect for sharing.