Cheesy Low Carb Philly Cheesesteak Casserole

If you’re a fan of the classic Philly cheesesteak but are looking for a healthier, low-carb version that doesn’t skimp on flavor, this Cheesy Low Carb Philly Cheesesteak Casserole is going to be your new favorite dish. Bursting with tender beef, sautéed peppers and onions, and plenty of melty cheese, this casserole captures all the robust flavors of the original sandwich in a satisfying, guilt-free meal.

Philly cheesesteaks are traditionally carb-heavy because of the hoagie roll, but by transforming the ingredients into a casserole format and focusing on low-carb ingredients, we can enjoy all that deliciousness without the bread. This recipe is ideal for meal prep or dinner when you want something comforting yet nutritious. Plus, it’s straightforward enough for even novice cooks and can be prepared in under an hour!

Ingredients

1 lb (450g) thinly sliced ribeye steak or sirloin
2 tablespoons olive oil
1 medium green bell pepper, thinly sliced
1 medium red bell pepper, thinly sliced
1 medium yellow onion, thinly sliced
3 cloves garlic, minced
Salt and freshly ground black pepper, to taste
1 teaspoon smoked paprika
1/2 teaspoon dried oregano
1/4 teaspoon red pepper flakes (optional)
8 oz (225g) cream cheese, softened
1/2 cup (120ml) heavy cream
1 cup (100g) shredded mozzarella cheese
1 cup (100g) shredded provolone cheese
1 cup (100g) shredded sharp cheddar cheese
2 tablespoons grated Parmesan cheese
Fresh parsley or chives, chopped, for garnish

Instructions

Preheat your oven to 375°F (190°C). Lightly grease a 9×9-inch (23×23 cm) baking dish and set aside.
In a large skillet, heat 1 tablespoon of olive oil over medium-high heat. Add the thinly sliced ribeye steak, seasoning with salt, pepper, smoked paprika, oregano, and red pepper flakes if using. Cook until the meat is browned and just cooked through, about 4-5 minutes. Remove from skillet and set aside.
In the same skillet, add the remaining tablespoon of olive oil. Sauté the sliced green and red bell peppers, onions, and garlic until they are soft and slightly caramelized, about 7-8 minutes. Season with a pinch of salt and pepper to enhance the flavor.
Reduce the skillet heat to low and add the cream cheese and heavy cream to the vegetables. Stir gently until the cream cheese melts completely and the mixture is smooth and creamy.
Return the cooked steak to the skillet and stir to combine everything evenly. Remove from heat.
Spread half of the steak and vegetable mixture evenly into the prepared baking dish.
Sprinkle half of the mozzarella, provolone, and cheddar cheeses over the first layer.
Add the remaining steak and vegetable mixture as the second layer, then top with the rest of the shredded cheeses.
Finally, sprinkle the grated Parmesan cheese evenly over the top for a golden crust.
Bake uncovered for 20-25 minutes, or until the cheese is melted, bubbly, and slightly golden on top.
Remove from the oven and let the casserole rest for 5 minutes before serving to allow it to set slightly for cleaner portions.
Garnish with freshly chopped parsley or chives for a burst of color and freshness.
Serve warm on its own or with a side salad for a complete meal.

Recipe Information

Prep time: 15 minutes
Cook time: 30 minutes
Total time: 45 minutes
Servings: 4-6
Difficulty level: Easy to moderate

Tips & Variations

For the best flavor, use ribeye or sirloin thinly sliced against the grain; this keeps the meat tender.
You can swap bell peppers for poblano or banana peppers for a different flavor profile.
Use a mix of cheeses for the perfect melty, cheesy texture and taste.
If you prefer spicier dishes, increase the red pepper flakes or add a dash of hot sauce.
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days and reheated in the oven or microwave.

Nutritional Information (estimated per serving)

Calories: 420 kcal
Protein: 32g
Carbohydrates: 6g
Fat: 30g
Fiber: 2g

Conclusion

If you’re craving the rich, savory flavors of a Philly cheesesteak but want to keep your carbs in check, this Cheesy Low Carb Philly Cheesesteak Casserole is sure to satisfy. It’s delicious, filling, and perfect for weeknight dinners or meal prepping. Pair it with a crisp green salad or roasted vegetables for a full, balanced meal.

Give this recipe a try and share your thoughts or any variations you’ve created in the comments below — I love hearing from fellow food enthusiasts! Happy cooking!