1. Preheat the oven
Set your oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish.
2. Cook the beef
In a large skillet over medium-high heat, brown the ground beef (or shaved steak) until fully cooked. Drain off any excess grease to keep the casserole from getting heavy.
3. Sauté the vegetables
In the same pan, add diced onion, bell peppers, mushrooms, and garlic. Cook for about 5–6 minutes, or until the vegetables soften and release their aroma. Season with salt, black pepper, smoked paprika (if using), and Worcestershire sauce for that signature Philly flavor.
4. Layer the base
Spread the cooked beef and vegetable mixture evenly across the bottom of your prepared baking dish.
5. Prepare the creamy mixture
In a separate bowl, whisk together cream cheese, mayonnaise, and eggs until the texture is smooth and creamy. This step gives the casserole its luscious, rich consistency — like a cross between a cheesesteak and a savory custard.
6. Assemble the casserole
Pour the cream cheese mixture over the beef and vegetables. Smooth it out gently with a spatula, then sprinkle shredded provolone and mozzarella cheese on top.
7. Bake to perfection
Place the dish in the oven and bake for 25–30 minutes, or until the top is golden brown and bubbling. The cheese should form a beautiful, gooey crust.
8. Rest and serve
Let the casserole sit for about 5 minutes before cutting into it. This helps everything set slightly so the slices hold together.
Serving Ideas
- Classic Style: Serve warm with toasted hoagie rolls for that true cheesesteak experience.
- Lighter Option: Pair it with a crisp green salad or roasted vegetables.
- Family Comfort Meal: Add a side of garlic bread or baked potatoes for a heartier dinner.
Why You’ll Love It
This Philly Cheesesteak Casserole has all the flavor of the classic sandwich, but with half the fuss. It’s rich and cheesy yet balanced by the sweetness of sautéed peppers and onions. Best of all, it reheats beautifully — making it ideal for meal prep or leftovers the next day.
Whether you’re feeding family, hosting friends, or just craving something cozy on a cold evening, this recipe brings that comforting, homemade taste that never goes out of style.
