For the Casserole Base:
1 ½ lbs ribeye steak or sirloin, thinly sliced (or shaved beef)
2 tablespoons olive oil or butter
1 large onion, thinly sliced
1 green bell pepper, thinly sliced
1 red bell pepper, thinly sliced
8 oz mushrooms, sliced (optional)
2 cloves garlic, minced
1 teaspoon Worcestershire sauce
½ teaspoon smoked paprika
Salt and black pepper to taste
For the Cheesy Filling & Topping:
4 large eggs
½ cup beef broth
1 cup shredded provolone cheese
1 cup shredded mozzarella cheese
½ cup grated Parmesan cheese
1 package (16 oz) frozen shredded hash browns, thawed – or 4 cups cooked rice or pasta
Optional Garnish:
Fresh chopped parsley
Sliced green onions
How to Make Philly Cheesesteak Casserole — Step by Step
Step 1: Sauté the Veggies & Beef
Preheat oven to 375°F (175°C). Grease a 9x13-inch baking dish.
In a large skillet, heat olive oil over medium-high heat. Add onions and bell peppers and cook until softened and slightly caramelized (about 8–10 minutes). Add mushrooms (if using) and garlic, and cook 3–4 more minutes. Remove from skillet and set aside.
In the same skillet, cook the thinly sliced steak until browned. Season with Worcestershire sauce, smoked paprika, salt, and pepper.
Step 2: Prepare the Casserole Base
In a large bowl, whisk together eggs and beef broth.
Stir in thawed hash browns (or cooked rice/pasta), the cooked steak, and veggie mixture.
Fold in ½ cup each of provolone and mozzarella cheeses.
Step 3: Layer & Bake
Spread the mixture evenly into the prepared baking dish.
Top with remaining provolone, mozzarella, and Parmesan cheese.
Cover with foil and bake for 25 minutes.
Remove foil and bake for another 10–15 minutes, until the cheese is melted, bubbly, and golden.
Step 4: Rest & Serve
Let the casserole cool for 5–10 minutes before serving.
Garnish with fresh parsley or green onions.
Tips for the Best Philly Cheesesteak Casserole
Slice Meat Thinly: Partially freeze the steak for 30 minutes before slicing—it’s much easier to get thin, even pieces!
Customize It: Add hot peppers, swap cheeses (American or Cheez Whiz are classic Philly choices!), or use cauliflower rice for a low-carb version.
Make It Ahead: Assemble the casserole (without baking), cover, and refrigerate overnight. Bake as directed, adding 5–10 extra minutes if needed.
What to Serve with Your Casserole
A simple side salad with tangy vinaigrette
Garlic bread or crusty rolls for dipping
Pickles or pepperoncini for a bright, tangy contrast
Final Slice
This Philly Cheesesteak Casserole brings the iconic flavors of the sandwich to your dinner table in the coziest way possible. It’s cheesy, savory, deeply satisfying, and so much fun to eat. Whether you’re from Philadelphia or just wish you were, this casserole is sure to hit the spot.
What’s your favorite way to enjoy cheesesteak flavors? Have you ever turned a sandwich into a casserole? Let us know in the comments! 🥩🧀
