🧀 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.

💖 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

🧀 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!)

🌟 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!

🛒 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

🧰 Tools You’ll Need

Large skillet
9x13-inch baking dish
Mixing bowls (medium & small)
Spatula or wooden spoon

🧩 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!