Philly Cheesesteak Casserole

If you’ve ever found yourself craving a Philly cheesesteak but didn’t want to deal with the mess or carbs of the bread, you are in for a treat. I just have to say — thank you for being here and letting me share this comforting, cheesy twist on a sandwich classic with you. I’m genuinely so excited for you to try this one! It’s cozy, rich, loaded with melty cheese and savory beef, and absolutely family-approved. Whether you’re watching carbs or just need an easy, satisfying dinner, this one hits the mark.

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💫 What Is Philly Cheesesteak Casserole?

This casserole takes all the iconic flavors of a traditional Philly cheesesteak—thinly sliced beef, sautéed onions and peppers, and a blend of gooey cheeses—and transforms them into a baked, breadless masterpiece. It’s everything you love about the sandwich, but in an oven-friendly, family-sized format.

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💖 Why You’ll Love This Recipe

• ✅ Low-carb and keto-friendly

• • ✅ Melty, gooey cheese in every bite

  • ✅ One pan = easy cleanup

  • ✅ Hearty, satisfying, and customizable

  • ✅ Perfect for meal prep or feeding a crowd

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  🧀 What It Tastes Like

• Imagine warm, savory beef mingled with sweet caramelized onions, tender peppers, and meaty mushrooms—layered with a creamy, cheesy mixture that gets golden and bubbly in the oven. It’s rich and comforting, with that classic Philly cheesesteak flavor... but spoonable. (And maybe even better than the sandwich? I said what I said!)

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  🌟 Health & Practical Benefits

  • Low in carbs, high in protein — perfect for keto or low-carb eaters.

  • Meal prep friendly — reheats like a dream.

  • No bread needed — ideal for gluten-free diets.

  • Versatile — switch the cheeses or meats to fit what you have!

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  🛒 Ingredients

  For the Casserole:

  • 1.5 lbs thinly sliced beef (ribeye, sirloin, or deli roast beef)

  • 1 tbsp olive oil

  • 1 onion, thinly sliced

  • 1 green bell pepper, thinly sliced

  • 8 oz mushrooms, sliced

  • 8 oz cream cheese, softened

  • ½ cup mayonnaise

  • 1 cup shredded provolone cheese

  • 1 cup shredded mozzarella cheese

  • ¼ cup grated Parmesan cheese

  • 1 tsp salt

  • ½ tsp black pepper

  For the Seasoning Mix:

  • 1 tsp garlic powder

  • 1 tsp onion powder

  • 1 tsp dried oregano

  • 1 tsp dried basil

  • ½ tsp red pepper flakes (optional)

  • Salt and pepper, to taste

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  🧰 Tools You’ll Need

  • Large skillet

  • 9x13-inch baking dish

  • Mixing bowls (medium & small)

  • Spatula or wooden spoon

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  🧩 Ingredient Swaps & Add-Ins

  • Ground beef instead of sliced steak? Totally fine (and budget-friendly).

  • Add jalapeños for heat or spinach for a veggie boost.

  • Try Swiss, cheddar, or pepper jack for a cheese remix.

  • Add a bottom layer of toasted hoagie rolls if you're not low-carb — it becomes a baked sandwich!

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  👩‍🍳 How to Make Philly Cheesesteak Casserole

•  How to Make Philly Cheesesteak Casserole

  1. Preheat the Oven

  Preheat to 375°F (190°C). Lightly grease a 9x13-inch baking dish.

  2. Cook the Beef

  Heat olive oil in a skillet over medium-high heat. Add sliced beef and cook until browned. Season with salt and pepper. Remove and set aside.

  3. Sauté the Veggies

  In the same skillet, sauté onions, peppers, and mushrooms until soft and lightly caramelized (about 5–7 minutes).

  4. Mix the Cheeses

• In a bowl, mix cream cheese and mayonnaise. Stir in Parmesan, half the provolone, and half the mozzarella until smooth.

  5. Combine Seasonings

  In a small bowl, stir together garlic powder, onion powder, oregano, basil, red pepper flakes, salt, and pepper.

  6. Assemble

  • Layer half of the beef in the dish.

  • Sprinkle with half the seasoning.

  • Add the veggie mixture.

  • Spread the creamy cheese blend evenly.

  • Top with remaining beef and seasoning.

  • Sprinkle the rest of the shredded cheeses on top.

  7. Bake

  Bake uncovered for 25–30 minutes, or until golden and bubbly.

  8. Rest & Serve

  Let sit 5–10 minutes before slicing. Serve hot and enjoy the melty magic!

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  🥗 What to Serve with It

  • A crisp green salad with balsamic vinaigrette

  • Roasted broccoli or Brussels sprouts

  • Cauliflower rice, mashed potatoes, or even spooned into hoagie rolls for sliders!

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  🧠 Tips for Success

  • Use pre-sliced deli roast beef if you're in a rush.

  • Let it rest before cutting so the layers hold together.

  • Want it extra creamy? Add a bit of sour cream to the cheese mixture!

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  🧊 Storage Instructions

  • Fridge: Store leftovers in an airtight container for up to 4 days.

  • Freezer: Wrap tightly and freeze for up to 2 months.

  • Reheat: Warm in the oven at 350°F until heated through, or microwave individual portions.

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  ❓ FAQs

  Can I make this ahead of time?

  Absolutely! Assemble it fully, cover, and refrigerate for up to 24 hours. Bake when ready.

  Is this casserole gluten-free?

  Yes — as long as your ingredients (especially the cheeses and seasoning) are labeled gluten-free.

  What’s the best cut of beef for this?

  Ribeye is classic, but sirloin or even leftover roast beef works wonderfully too.

  Can I double this recipe?

  Yes! Just use a larger baking dish or two and adjust the bake time as needed.

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  🧁 Craving More Cheesy Comfort?

  If you loved this, you’ll definitely want to try:

  • 🍓 Strawberry Cream Cheese Icebox Cake – light and sweet with a tangy twist

  • 🥔 Perfect Baked Potatoes – crisp on the outside, fluffy on the inside

  • 🍖 Crock Pot Mississippi Roast – an effortless, flavor-packed dinner