If you’re looking for that rich, savory, and gloriously cheesy Philly cheesesteak experience while maintaining a low-carb lifestyle, this recipe might become a new favorite! This high protein low carb philly cheesesteak casserole brings those incredible flavors to your kitchen. It’s a one-pan dish that delivers on taste and texture, making it suitable for any weeknight meal.
Why You’ll Appreciate This One-Pan Casserole
Deep, Authentic Flavor: Unlike some versions that use only ground beef, this casserole focuses on building layers of flavor. By searing thinly shaved steak, we aim for a rich crust from the Maillard reaction, which is key for an authentic cheesesteak taste.
The Pan Sauce is Important: A significant step involves deglazing the pan. Using beef broth to scrape up all those flavorful browned bits, known as the fond, after searing the steak creates a savory sauce that infuses every bite of the casserole. This technique helps to build a more complex flavor often missed in simpler ground beef recipes.
Quick & Easy Cleanup: One practical aspect of this recipe is its simplicity. When you use an oven-safe cast iron skillet, it moves smoothly from stovetop to oven, helping to reduce the amount of dishes after dinner.
Keto & High-Protein Friendly: This casserole is designed to align with a low-carb and keto lifestyle. It’s packed with protein, which can help you feel full and satisfied. For another excellent way to incorporate protein into your day, consider making some protein overnight oats for a nutritious breakfast.
Ingredients You’ll Need
Crafting a flavorful Philly cheesesteak casserole starts with selecting quality ingredients that will bring this classic profile to life. Here’s what you’ll gather from your pantry and fridge.
Ingredients
- 2 lb thinly sliced sirloin or ribeye steak (shaved steak), *or* 2 lb ground beef (for a simpler option)
- 1-2 tbsp high-heat oil (such as avocado or olive oil)
- 2 tsp Sea salt
- 1/2 tsp Black pepper
- 3 large Bell peppers (sliced into thin strips; use a mix of colors like red, yellow, and green)
- 1 large Onion (cut in half, sliced into thin slices)
- 1/2 tbsp Italian seasoning
- 1 tsp Smoked paprika
- 1/2 tsp Garlic powder
- 4 oz Cream cheese (cut into pieces and softened at room temperature)
- 1/4 cup Chicken broth, reduced sodium (or beef broth for deeper flavor)
- 1 tsp Worcestershire sauce (optional, for added depth)
- 6 slices Provolone cheese (~4 oz)
Ingredient Notes & Choosing Your Steak
The Meat: For a more authentic cheesesteak experience, we recommend using shaved steak, specifically sirloin or ribeye. Its thinness allows for good browning, which contributes to a better texture. You can often find it pre-shaved at the butcher counter, or you can easily slice a partially frozen steak very thinly at home. If you prefer a quicker and more budget-friendly option, ground beef works well too.
The Cheese: Provolone is the classic choice here, offering a mild, creamy, and slightly tangy flavor. If possible, opt for a good quality block of provolone and slice it yourself; it tends to melt nicely and has more character than some pre-packaged slices. For a different twist, white American cheese offers a very creamy melt, and some enthusiasts even enjoy Cheez Whiz for a distinct Philly vibe.
The Veggies: The key to integrating the bell peppers and onion smoothly into this Philly cheesesteak casserole is to slice them into thin strips, rather than dicing them. This mimics the traditional texture of a cheesesteak sandwich and helps the vegetables blend well with the meat, providing a cohesive bite.
The Sauce Base: Softened cream cheese is important for achieving a smooth, lump-free, and rich sauce. Cold cream cheese can be difficult to incorporate smoothly! For an even deeper beefy flavor, especially when deglazing the pan, beef broth is often preferred over chicken broth, though chicken broth is also suitable.
Flavor Boosters: If you want to add another layer of savory umami and a hint of tang that complements the rich beef, a teaspoon of Worcestershire sauce stirred into the pan sauce can enhance the flavor.
How to Make the Philly Cheesesteak Casserole
Prep Your Ingredients and Build the Foundation
- To start, preheat your oven to 350°F (177°C). While the oven heats, ensure all your bell peppers and onions are thinly sliced, and any other ingredients are measured and ready for a smooth cooking process.
- If using shaved steak: Heat the 1-2 tablespoons of high-heat oil in a large, oven-safe sauté pan or cast iron skillet over medium-high heat until shimmering. Sear the 2 lbs of thinly shaved steak in small, uncrowded batches. This is important for achieving a browned, flavorful crust in just 1-2 minutes per side. Once seared, remove the steak and set it aside; it will be added back later.
- If using ground beef: Place the 2 lbs ground beef into the large, oven-safe sauté pan or cast iron skillet over medium-high heat. Break it up with a spatula and season it generously with sea salt and black pepper. Cook the beef for 8-10 minutes, stirring occasionally, until it’s browned and cooked through. Drain any excess grease.
Sauté, Deglaze, and Create the Creamy Sauce
- After cooking the meat (and draining excess grease if using ground beef), add the thinly sliced bell peppers and onions to the same pan. Season them with Italian seasoning, smoked paprika, and garlic powder. Let them sauté for 10-15 minutes until their colors deepen and they begin to soften.
- Next, pour the chicken or beef broth into the pan with the tender vegetables. Use a wooden spoon to scrape up all the browned bits, the fond, from the bottom of the pan. This process, called deglazing, lifts concentrated flavor into your sauce. Then, stir in the softened cream cheese until it melts completely, creating a smooth sauce base. If using, stir in the Worcestershire sauce here.
Combine and Bake to Cheesy Perfection
- If you opted for the shaved steak, now is the time to add that beautifully seared steak back into the pan. Stir everything together until the steak, vegetables, and creamy sauce are thoroughly combined.
- If your pan isn’t oven-safe, transfer the entire mixture to a large baking dish. Then, arrange the slices of provolone cheese over the top, overlapping them slightly to ensure good coverage.
- Finally, bake your Philly cheesesteak casserole for 10-15 minutes, or until the provolone cheese is completely melted, bubbly, and has just begun to turn golden brown.
Tips for a Great Casserole (No Watery Mess!)
How to Prevent a Watery or Greasy Casserole
Achieving a well-textured casserole requires a few steps. Avoid overcrowding your pan, especially when sautéing vegetables, as this can cause them to steam instead of sear, releasing excess water. Cook your vegetables thoroughly until they are tender-crisp and have released most of their moisture. If you’re using ground beef, always drain any excess grease after browning to prevent a greasy final dish.
The Art of the Cut: Slicing for Authentic Texture
The way you slice your vegetables makes a difference in this dish. Thin strips of bell peppers and onions are generally preferred over diced pieces. This particular cut mimics the traditional texture of a classic cheesesteak sandwich, creating long strands that integrate well with thinly sliced steak. This can lead to a more cohesive, satisfying mouthfeel.
The Science of a Smooth Cheese Sauce
For a beautifully smooth and rich cheese sauce, the secret lies in using softened, room-temperature cream cheese. If you try to stir cold cream cheese directly into a hot pan, it will tend to seize up and create stubborn lumps. Plan ahead and let your cream cheese sit out for a bit.
Pro Tips and Variations
Expert Tips for Enhanced Flavor
- Get a Good Char: For a deeper, subtly smoky flavor in your casserole, allow the vegetables to cook undisturbed for a few minutes. This can help develop a slight char before you introduce the sauce ingredients, adding complexity.
- Finish with the Broiler: If your cheese is melted but not quite as golden or bubbly as you’d like, switch your oven to a high broil for 1-2 minutes at the end. Keep a very close eye on it, as cheese can go from perfect to burnt quickly!
- One-Pan Approach: Using a 12-inch cast iron skillet allows you to prepare, cook, and even serve this dish all from the same pan. It simplifies the entire process and minimizes cleanup significantly.
Easy Recipe Variations
- Mushroom Lovers: For an added layer of earthiness and umami, sauté 8 oz of sliced mushrooms along with your bell peppers and onions.
- Add Some Heat: If you enjoy a little kick, swap one of the bell peppers for a poblano, or include a few thinly sliced jalapeños in the mix.
- Cheese Swap: While provolone is classic, feel free to experiment! White American cheese will give you an ultra-creamy melt, or try a mix of provolone and mozzarella for a different texture.
Serving, Storing, and Meal Prep
What to Serve with Your Cheesesteak Casserole
To keep this delicious meal low-carb, you can serve this casserole over a bed of cauliflower rice. A simple green salad dressed with a light vinaigrette is also a good accompaniment, offering a fresh contrast to the richness of the dish. For an added touch of brightness and a pop of color, a sprinkle of fresh parsley over the top works well. For those who enjoy a bit more heat, have your favorite hot sauce ready on the side!
Make-Ahead, Storage, and Reheating Instructions
This casserole is suitable for meal prep. You can assemble the entire dish in your baking pan, cover it tightly, and refrigerate for up to 2 days before baking. It might need an extra 5-10 minutes in the oven if baked from cold. For another great high-protein, low-carb main meal to add to your rotation, consider making some tasty Avocado Tuna boats.
To store leftovers, transfer the cooled casserole to an airtight container and keep it in the refrigerator for up to 4 days. If you’re looking to freeze it for longer-term meal prep, it’s best to freeze it baked and cooled. Wrap the dish tightly first in plastic wrap, then in aluminum foil, and it will keep well in the freezer for up to 3 months.
When you’re ready to enjoy it again, thaw the frozen casserole in the refrigerator overnight. Individual portions can be quickly reheated in the microwave, or you can reheat the entire casserole in a 350°F oven until it’s warmed through and bubbly again.
High Protein Low Carb Philly Cheesesteak Casserole
Equipment
- Large, oven-safe sauté pan or cast iron skillet
- wooden spoon
- Large baking dish (if pan is not oven-safe)
Ingredients
- 2 lb thinly sliced sirloin or ribeye steak (shaved steak, or 2 lb ground beef for a simpler option)
- 1-2 tbsp high-heat oil (such as avocado or olive oil)
- 2 tsp Sea salt
- 0.5 tsp Black pepper
- 3 large Bell peppers (sliced into thin strips; use a mix of colors like red, yellow, and green)
- 1 large Onion (cut in half, sliced into thin slices)
- 0.5 tbsp Italian seasoning
- 1 tsp Smoked paprika
- 0.5 tsp Garlic powder
- 4 oz Cream cheese (cut into pieces and softened at room temperature)
- 0.25 cup Chicken broth, reduced sodium (or beef broth for deeper flavor)
- 1 tsp Worcestershire sauce (optional, for added depth)
- 4 oz Provolone cheese (~6 slices)
Instructions
Prep Your Ingredients and Build the Foundation
- To start, preheat your oven to 350°F (177°C). While the oven heats, ensure all your bell peppers and onions are thinly sliced, and any other ingredients are measured and ready for a smooth cooking process.
- If using shaved steak: Heat the 1-2 tablespoons of high-heat oil in a large, oven-safe sauté pan or cast iron skillet over medium-high heat until shimmering. Sear the 2 lbs of thinly shaved steak in small, uncrowded batches for 1-2 minutes per side to achieve a browned, flavorful crust. Once seared, remove the steak and set it aside; it will be added back later.
- If using ground beef: Place the 2 lbs ground beef into the large, oven-safe sauté pan or cast iron skillet over medium-high heat. Break it up with a spatula and season it generously with sea salt and black pepper. Cook the beef for 8-10 minutes, stirring occasionally, until it’s browned and cooked through. Drain any excess grease.
Sauté, Deglaze, and Create the Creamy Sauce
- After cooking the meat (and draining excess grease if using ground beef), add the thinly sliced bell peppers and onions to the same pan. Season them with Italian seasoning, smoked paprika, and garlic powder. Let them sauté for 10-15 minutes until their colors deepen and they begin to soften.
- Next, pour the chicken or beef broth into the pan with the tender vegetables. Use a wooden spoon to scrape up all the browned bits, the fond, from the bottom of the pan to deglaze and lift concentrated flavor into your sauce. Then, stir in the softened cream cheese until it melts completely, creating a smooth sauce base. If using, stir in the Worcestershire sauce here.
Combine and Bake to Cheesy Perfection
- If you opted for the shaved steak, now is the time to add that beautifully seared steak back into the pan. Stir everything together until the steak, vegetables, and creamy sauce are thoroughly combined.
- If your pan isn’t oven-safe, transfer the entire mixture to a large baking dish. Then, arrange the slices of provolone cheese over the top, overlapping them slightly to ensure good coverage.
- Finally, bake your Philly cheesesteak casserole for 10-15 minutes, or until the provolone cheese is completely melted, bubbly, and has just begun to turn golden brown.
Notes
- Get a Good Char: Allow vegetables to cook undisturbed for a few minutes to develop a subtle char before adding sauce ingredients, enhancing complexity.
- Finish with the Broiler: For golden, bubbly cheese, broil the casserole for 1-2 minutes at the end. Watch closely to prevent burning.
- One-Pan Approach: Use a 12-inch cast iron skillet to prepare, cook, and serve from the same pan, simplifying the process and minimizing cleanup.
- Mushroom Lovers: Sauté 8 oz of sliced mushrooms along with the bell peppers and onions for added earthiness.
- Add Some Heat: Swap one bell pepper for a poblano or include a few thinly sliced jalapeños for a kick.
- Cheese Swap: Experiment with white American cheese for an ultra-creamy melt, or a mix of provolone and mozzarella for a different texture.
- Make-Ahead: Assemble the entire dish, cover tightly, and refrigerate for up to 2 days before baking. It may require an extra 5-10 minutes in the oven.
- Storage: Store cooled leftovers in an airtight container in the refrigerator for up to 4 days.
- Freezing: Freeze the baked and cooled casserole wrapped in plastic wrap and then foil for up to 3 months.
- Reheating: Thaw frozen casserole overnight in the refrigerator. Reheat individual portions in the microwave or the whole casserole in a 350°F oven until warmed through.
Nutrition
Frequently Asked Questions
What is the best meat for a Philly cheesesteak casserole: shaved steak or ground beef?
While ground beef works as a convenient option, for a more authentic flavor and texture in a Philly cheesesteak casserole, thinly shaved steak (such as sirloin or ribeye) is often preferred. Searing the shaved steak can create a rich, browned crust and allows for deglazing the pan for a deeper beefy flavor.
How can I prevent my casserole from becoming watery or greasy?
To avoid a watery casserole, ensure you don’t overcrowd the pan when sautéing vegetables, as this can steam them and release too much moisture. Cook the vegetables until they are tender-crisp. If using ground beef, make sure to thoroughly drain any excess grease after browning it to prevent a greasy final dish.
What are some low-carb side dishes to serve with this casserole?
Good low-carb side dishes include cauliflower rice, a fresh green salad with a light vinaigrette, or steamed green beans. These options complement the rich flavors of the casserole without adding many carbohydrates.
Can I make this Philly cheesesteak casserole ahead of time?
Yes, you can! Assemble the entire casserole in your baking dish, cover it tightly, and refrigerate it for up to 2 days before baking. You might need to add an additional 5-10 minutes to the baking time if it’s going into the oven cold from the fridge.
How do I freeze and reheat this casserole for easy meal prep?
To freeze, allow the baked casserole to cool completely. Wrap the dish tightly in plastic wrap, then in aluminum foil, and freeze for up to 3 months. For reheating, thaw it overnight in the refrigerator. Individual portions can be microwaved, or the whole casserole can be reheated in a 350°F oven until warmed through.
What cheese is best for a classic cheesesteak flavor?
Provolone cheese is a classic choice for an authentic Philly cheesesteak flavor, offering a mild, creamy, and slightly tangy taste. For an extra creamy melt, white American cheese is also a popular option. Some enthusiasts even prefer Cheez Whiz for its distinctive, smooth texture and flavor.
