A Cheesy, Comforting Low-Carb Dinner Packed with Classic Philly Flavor
If you love the savory flavors of a classic Philly cheesesteak, you’re going to love this Philly Cheesesteak Casserole. It takes all the best parts of the beloved sandwich—seasoned beef, tender peppers and onions, and plenty of melty cheese—and turns them into a creamy, satisfying oven-baked dinner.
This easy casserole is perfect for busy weeknights, family dinners, meal prep, or whenever you’re craving serious comfort food without the extra carbs from a hoagie roll. Every bite is packed with tender beef, sautéed vegetables, a rich cream cheese sauce, and gooey provolone and mozzarella.
Best of all, it comes together with simple ingredients and requires minimal cleanup.
Why You’ll Love This Philly Cheesesteak Casserole
- Easy to Make: Simple ingredients and straightforward steps make this an easy weeknight meal.
- Cheesy & Comforting: Cream cheese, provolone, and mozzarella create an irresistibly creamy, cheesy finish.
- Low-Carb Friendly: Skip the bread and enjoy all the classic cheesesteak flavors in casserole form.
- Family-Friendly: Hearty, flavorful, and satisfying enough for the whole family.
- Great for Meal Prep: Leftovers reheat well, making this a convenient make-ahead dinner.
- Customizable: Add mushrooms, jalapeños, extra cheese, or your favorite toppings to make it your own.
Ingredients
- 1½ pounds beef sirloin, flank steak, or ground beef
- 1 tablespoon olive oil
- 1 green bell pepper, thinly sliced
- 1 red bell pepper, thinly sliced
- 1 large onion, sliced
- 3 cloves garlic, minced
- 8 ounces cream cheese, softened
- 1 cup heavy cream
- 1 teaspoon Worcestershire sauce
- ½ teaspoon smoked paprika
- Salt and black pepper, to taste
- 1½ cups shredded provolone cheese
- 1 cup shredded mozzarella cheese
- Optional: sliced mushrooms, jalapeños, and fresh parsley
How to Make Philly Cheesesteak Casserole
1. Preheat the Oven
Preheat your oven to 375°F (190°C). Lightly grease a casserole dish with cooking spray or a little oil. If you’re using an oven-safe skillet, you can prepare the entire casserole in the same pan.
2. Cook the Beef
Heat the olive oil in a large skillet over medium-high heat. Add the beef and cook until browned and cooked through. If using ground beef, break it apart with a wooden spoon as it cooks.
Season with salt, black pepper, and smoked paprika. If there is excess grease in the skillet, carefully drain it before continuing.
3. Sauté the Peppers and Onions
Add the sliced onion and bell peppers to the same skillet. Cook for 5–7 minutes, stirring occasionally, until the vegetables are tender and lightly caramelized.
Add the minced garlic and cook for about 30 seconds, just until fragrant.
4. Make the Creamy Sauce
Reduce the heat to medium. Add the softened cream cheese and stir until it melts into the beef and vegetables.
Pour in the heavy cream and Worcestershire sauce. Stir everything together until the mixture is smooth, creamy, and well combined.
5. Add Some Cheese
Stir in ½ cup of the shredded provolone and ½ cup of the shredded mozzarella. Continue stirring until the cheese melts into the creamy beef mixture.
6. Assemble and Bake
If you prepared everything in a regular skillet, transfer the mixture to your prepared casserole dish.
Sprinkle the remaining provolone and mozzarella evenly over the top.
Bake uncovered for 20–25 minutes, or until the casserole is hot, bubbly, and golden around the edges.
7. Rest and Serve
Remove the casserole from the oven and let it rest for about 5 minutes before serving.
Garnish with fresh parsley if desired, then serve hot and enjoy!
Serving Suggestions
This hearty casserole can be served on its own or paired with a simple side dish. Try it with:
- A crisp green salad
- Roasted broccoli or cauliflower
- Roasted zucchini
- Steamed green beans
- Low-carb wraps or lettuce cups
- Toasted hoagie rolls for a classic sandwich-style meal
Easy Recipe Variations
Make It Spicy
Add sliced jalapeños or a pinch of crushed red pepper flakes for a little heat.
Add Mushrooms
For a mushroom cheesesteak twist, sauté sliced mushrooms along with the onions and peppers.
Make It Extra Cheesy
Add shredded cheddar or pepper jack along with the provolone and mozzarella for an even richer casserole.
Keep It Classic
For a more traditional cheesesteak-inspired flavor, use provolone as the main cheese and keep the seasonings simple.
Storage and Reheating
Refrigerator: Store leftover casserole in an airtight container for up to 4 days.
Freezer: Once completely cooled, freeze in an airtight, freezer-safe container for up to 2 months.
Reheating: Reheat individual portions in the microwave until hot. For larger portions, warm in a 350°F (175°C) oven until heated through.
Frequently Asked Questions
Can I use ground beef instead of steak?
Yes. Ground beef makes this casserole especially easy and budget-friendly. You can also use thinly sliced sirloin or flank steak for a more traditional cheesesteak texture.
Can I make this casserole ahead of time?
Yes. Assemble the casserole, cover it, and refrigerate it until you’re ready to bake. You may need to add a few extra minutes to the baking time if it goes directly from the refrigerator to the oven.
Can I add mushrooms?
Absolutely. Mushrooms are a delicious addition and pair especially well with the beef, peppers, onions, and cheese.
Is Philly Cheesesteak Casserole keto-friendly?
This version is designed to be low-carb and keto-friendly, especially when served without bread or high-carb side dishes. Exact carbohydrate amounts will depend on the specific ingredients and brands used.
Nutrition Information
Approximate per serving:
- Calories: 420
- Protein: High
- Carbohydrates: Low
- Keto-friendly: Yes
Final Thoughts
This Philly Cheesesteak Casserole is an easy way to enjoy the flavors of a classic cheesesteak in a warm, cheesy, comforting meal. With seasoned beef, tender peppers and onions, a creamy sauce, and plenty of melted cheese, it’s satisfying enough for a family dinner while being simple enough for a busy weeknight.
Whether you’re following a low-carb lifestyle or simply looking for an easy comfort-food recipe, this cheesy casserole is sure to become a regular on your dinner table.
