Philly Cheesesteak Casserole: A Comforting Twist on a Classic American Favorite

The classic Philly cheesesteak is famous for its combination of thinly sliced beef, melted cheese, sautéed onions, and peppers tucked inside a soft roll. This beloved sandwich originated in Philadelphia and has become a favorite comfort food across the country. A Philly Cheesesteak Casserole takes all those familiar flavors and transforms them into a hearty, family-friendly baked dish that is easy to prepare, satisfying, and perfect for busy weeknight dinners.

This casserole keeps the signature elements of the original sandwich while adding a creamy, cheesy texture and a convenient oven-baked finish. Instead of assembling individual sandwiches, everything is combined into one dish that can feed a crowd. It is a great choice for meal prep, potlucks, or a cozy homemade dinner.

What Makes Philly Cheesesteak Casserole Special?

The magic of this casserole comes from the balance of flavors and textures. Tender beef provides a rich savory base, while caramelized onions and colorful peppers add sweetness and depth. The melted cheese creates a creamy layer that ties all the ingredients together.

Unlike a traditional cheesesteak sandwich, this casserole allows the flavors to blend while baking. The result is a warm, cheesy dish with a comforting texture and the familiar taste of the famous Philadelphia sandwich.

Ingredients You Will Need

To prepare a delicious Philly Cheesesteak Casserole, gather the following ingredients:

• 1 ½ pounds thinly sliced steak or ground beef
• 1 tablespoon olive oil
• 1 large onion, thinly sliced
• 1 green bell pepper, sliced
• 1 red bell pepper, sliced
• 2–3 cloves garlic, minced
• 8 ounces cream cheese, softened
• ½ cup sour cream
• 1 cup beef broth
• 1 teaspoon Worcestershire sauce
• 1 teaspoon salt (adjust to taste)
• ½ teaspoon black pepper
• 1 teaspoon Italian seasoning
• 2 cups shredded provolone cheese
• 1 cup shredded mozzarella cheese
• Optional: sliced mushrooms for extra flavor
• Optional: cooked pasta or rice for a more filling casserole

Step-by-Step Method to Make Philly Cheesesteak Casserole

Step 1: Prepare the Ingredients

Before cooking, prepare all your ingredients. Slice the onions and peppers into thin strips so they cook evenly. If using steak, slice it into thin pieces similar to what you would find in a traditional cheesesteak sandwich. Allow the cream cheese to soften at room temperature so it blends easily into the sauce.

Preparing everything ahead of time makes the cooking process smoother and helps prevent overcooking the vegetables or meat.

Step 2: Cook the Beef

Heat olive oil in a large skillet over medium-high heat. Add the sliced steak or ground beef and cook until browned and cooked through.

If using steak slices, avoid overcrowding the pan because this can cause the meat to steam instead of sear. Cooking in batches can help create better flavor.

Once cooked, remove the beef from the skillet and set it aside.

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