Low Carb Philly Cheesesteak Casserole – Comforting, Cheesy, and Weeknight-Friendly

If you love the flavors of a classic Philly cheesesteak but want to keep your carbs in check, this casserole hits the spot. It’s loaded with tender beef, sautéed peppers and onions, and a rich, melty cheese topping. No bread required, but all the comfort still shows up.

This is the kind of dish that feels special enough for company yet easy enough for a busy Tuesday. Plus, it reheats beautifully, so leftovers never go to waste.

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Low Carb Philly Cheesesteak Casserole – Comforting, Cheesy, and Weeknight-Friendly

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Prep Time 15 minutes mins

Cook Time 30 minutes mins

Total Time 45 minutes mins

Servings: 6 servings

Ingredients
Method

Ingredients

  

• 1.25 to 1.5 pounds thinly sliced beef (sirloin, shaved steak, or ribeye, trimmed)
• 2 tablespoons olive oil (or avocado oil)
• 1 large yellow onion, thinly sliced
• 1 green bell pepper, thinly sliced
• 1 red bell pepper, thinly sliced
• 3 cloves garlic, minced
• 4 ounces cream cheese, softened
• 1/2 cup sour cream (or full-fat Greek yogurt)
• 1 tablespoon Worcestershire sauce
• 1 teaspoon Dijon mustard
• 1/2 teaspoon smoked paprika (optional)
• Salt and black pepper, to taste
• 6 to 8 slices provolone cheese (or 1.5 cups shredded provolone)
• 1/2 cup shredded mozzarella (optional, for extra melt)
• Chopped parsley, for garnish (optional)
• Cooking spray, for the baking dish

Method

 

1. Preheat the oven. Set your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
2. Prep the veggies. Slice the onion and peppers into thin strips.

   Mince the garlic so it cooks evenly.

3. Sauté the vegetables. Heat 1 tablespoon of oil in a large skillet over medium-high heat. Add onions and peppers with a pinch of salt. Cook 6–8 minutes, stirring occasionally, until softened and lightly browned.

   Add garlic for the last 30 seconds. Transfer to the baking dish.

4. Cook the beef. Add the remaining oil to the hot skillet. Season the beef with salt and pepper.

   Cook in batches if needed, 2–4 minutes total, just until browned and no longer pink. Do not overcook. Add to the baking dish with the vegetables.

5. Make the creamy mix. In a bowl, whisk together cream cheese, sour cream, Worcestershire sauce, Dijon, smoked paprika, and a few grinds of black pepper.

   Microwave 10–15 seconds if the cream cheese is too firm, then whisk until smooth.

6. Combine. Spoon the cream mixture over the beef and veggies. Toss gently to coat and spread evenly in the dish.
7. Add the cheese. Layer provolone slices over the top, slightly overlapping. Sprinkle mozzarella on top if you’re using it for extra stretch.
8. Bake. Cook for 12–15 minutes until the cheese is melted and bubbling around the edges.

   For a golden top, broil for 1–2 minutes at the end, watching closely.

9. Rest and serve. Let the casserole sit for 5 minutes to set. Garnish with chopped parsley and serve hot.

Why This Recipe Works

This casserole keeps the heart of a cheesesteak—beef, peppers, onions, and cheese—while cutting carbs by skipping the roll. Using thinly sliced beef cooks it fast and keeps it tender.

Cream cheese and provolone create a creamy, gooey layer that binds everything together without flour or starch. The result is a hearty, low-carb dinner that’s satisfying and simple to pull off.

What You’ll Need

• 1.25 to 1.5 pounds thinly sliced beef (sirloin, shaved steak, or ribeye, trimmed)
• 2 tablespoons olive oil (or avocado oil)
• 1 large yellow onion, thinly sliced
• 1 green bell pepper, thinly sliced
• 1 red bell pepper, thinly sliced
• 3 cloves garlic, minced
• 4 ounces cream cheese, softened
• 1/2 cup sour cream (or full-fat Greek yogurt)
• 1 tablespoon Worcestershire sauce
• 1 teaspoon Dijon mustard
• 1/2 teaspoon smoked paprika (optional)
• Salt and black pepper, to taste
• 6 to 8 slices provolone cheese (or 1.5 cups shredded provolone)
• 1/2 cup shredded mozzarella (optional, for extra melt)
• Chopped parsley, for garnish (optional)
• Cooking spray, for the baking dish

How to Make It

1. Preheat the oven. Set your oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
2. Prep the veggies. Slice the onion and peppers into thin strips.

   Mince the garlic so it cooks evenly.

3. Sauté the vegetables. Heat 1 tablespoon of oil in a large skillet over medium-high heat. Add onions and peppers with a pinch of salt. Cook 6–8 minutes, stirring occasionally, until softened and lightly browned.

   Add garlic for the last 30 seconds. Transfer to the baking dish.

4. Cook the beef. Add the remaining oil to the hot skillet. Season the beef with salt and pepper.

   Cook in batches if needed, 2–4 minutes total, just until browned and no longer pink. Do not overcook. Add to the baking dish with the vegetables.

5. Make the creamy mix. In a bowl, whisk together cream cheese, sour cream, Worcestershire sauce, Dijon, smoked paprika, and a few grinds of black pepper.

   Microwave 10–15 seconds if the cream cheese is too firm, then whisk until smooth.

6. Combine. Spoon the cream mixture over the beef and veggies. Toss gently to coat and spread evenly in the dish.
7. Add the cheese. Layer provolone slices over the top, slightly overlapping. Sprinkle mozzarella on top if you’re using it for extra stretch.
8. Bake. Cook for 12–15 minutes until the cheese is melted and bubbling around the edges.

   For a golden top, broil for 1–2 minutes at the end, watching closely.

9. Rest and serve. Let the casserole sit for 5 minutes to set. Garnish with chopped parsley and serve hot.

How to Store

• Refrigerator: Store leftovers in an airtight container for up to 4 days.
• Freezer: Freeze portions in freezer-safe containers for up to 2 months. Thaw overnight in the fridge before reheating.
• Reheat: Warm in a 300°F (150°C) oven for 12–15 minutes or microwave in 45-second bursts until hot.

  Add a splash of broth or cream if it looks dry.

Benefits of This Recipe

• Low carb and keto-friendly: No bread, and the creamy sauce adds fat to keep you satisfied.
• Meal prep friendly: Holds up well in the fridge and reheats without getting soggy.
• High protein: Beef and cheese deliver solid protein to keep you full.
• Comforting and family-approved: Familiar flavors, melty cheese, and hearty textures make it a crowd-pleaser.
• Flexible: Easy to customize for different tastes or dietary needs.

Common Mistakes to Avoid

• Overcooking the beef: Thin slices cook fast. Pull it as soon as the pink is gone to avoid tough meat.
• Skipping the sauté: Raw peppers and onions release water and get mushy. Sauté them for sweet flavor and better texture.
• Using cold cream cheese: Cold cream cheese won’t blend well.

  Soften it or warm it slightly for a smooth sauce.

• Not draining excess liquid: If your beef releases lots of juices, spoon off some before mixing to prevent a watery casserole.
• Overcrowding the pan: Cook the beef in batches for proper browning instead of steaming.

Variations You Can Try

• Mushroom lover’s version: Sauté 8 ounces sliced mushrooms with the onions and peppers for extra umami and bulk.
• Spicy cheesesteak: Add sliced jalapeños, red pepper flakes, or a drizzle of hot sauce to the cream mixture.
• Chicken cheesesteak casserole: Swap beef for thinly sliced chicken thighs or breasts. Cook until just done to keep it tender.
• Cauliflower boost: Stir in 2 cups of roasted cauliflower florets to add volume without many carbs.
• Different cheeses: Try a blend of provolone and cheddar, or use pepper jack for heat.
• Dairy-light option: Use Neufchâtel cream cheese and half the provolone. The texture is lighter but still satisfying.

FAQ

Can I use ground beef instead of sliced steak?

Yes.

Brown 1.25 to 1.5 pounds of ground beef, drain excess fat, and proceed with the recipe. The flavor is great, and it’s often cheaper and faster than slicing steak.

What cut of beef works best?

Sirloin, ribeye, or pre-shaved steak all work well. Aim for thin slices so the meat cooks quickly and stays tender.

If slicing at home, partially freeze the steak for 30–45 minutes first to make thin slicing easier.

Is Worcestershire sauce low carb?

Most brands are fairly low in carbs in small amounts. One tablespoon typically adds only a gram or two of carbs to the entire dish. If you prefer, use coconut aminos or tamari for a similar savory note.

How can I make it even lower in carbs?

Skip the onions or reduce them by half, use only green peppers, and choose full-fat dairy with no added starches.

You can also replace Worcestershire with a splash of soy sauce and a pinch of sweetener if needed.

Can I make this ahead?

Yes. Assemble up to the cheese topping, cover, and refrigerate for up to 24 hours. Bake just before serving, adding a few extra minutes if it’s cold from the fridge.

What should I serve with it?

Try a simple green salad, roasted broccoli, or sautéed zucchini.

If you’re not strict low carb, buttered toasted rolls on the side make great “casserole sliders.”

Can I skip the cream cheese?

You can, but the casserole will be less creamy and cohesive. If skipping, add an extra 1/2 cup shredded cheese and a splash of heavy cream to keep it moist.

How do I keep the cheese from browning too fast?

Cover loosely with foil for the first 10 minutes, then uncover to finish. Or move the dish to a lower oven rack.

Broil only at the end if you want a golden top.

In Conclusion

This Low Carb Philly Cheesesteak Casserole gives you everything you love about the classic sandwich without the bread. It’s easy, satisfying, and customizable for whatever you have on hand. Make it once, and it’ll become a regular on your weeknight rotation—and a reliable meal prep favorite.

Enjoy the comfort, skip the carbs, and keep dinner simple.