Philly Cheesesteak Casserole

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Here’s a detailed, original article on Philly Cheesesteak Casserole, written in a warm, food-blog style with clear step-by-step instructions.

Philly Cheesesteak Casserole: All the Flavor of the Classic Sandwich in One Comforting Dish

The Philly cheesesteak is an American classic—thinly sliced beef, sautéed onions and peppers, and gooey melted cheese tucked into a soft roll. While the sandwich itself is legendary, turning it into a casserole makes it even more comforting and convenient. Philly Cheesesteak Casserole delivers all the bold, savory flavors you love, but in an easy, oven-baked form that’s perfect for family dinners, potlucks, or make-ahead meals.

This dish combines tender beef, caramelized vegetables, creamy cheese, and a hearty base, creating a satisfying meal that’s both rich and comforting. Best of all, it’s simple to prepare and customizable to your taste.

Why You’ll Love This Casserole

All the classic flavors, no sandwich assembly required
Easy to make ahead and reheat well
Perfect comfort food for busy weeknights
Crowd-pleasing and filling
Easily adaptable with different cheeses or add-ins

Ingredients You’ll Need

Thinly sliced beef steak (sirloin, ribeye, or shaved steak)
Onion, thinly sliced
Green bell pepper, thinly sliced
Mushrooms (optional, but traditional in many versions)
Garlic, minced
Olive oil or butter
Salt and black pepper
Worcestershire sauce
Cream cheese or sour cream (for creaminess)
Provolone cheese, shredded or sliced
Mozzarella or white American cheese (optional, for extra melt)
Cooked pasta, rice, or diced potatoes (your casserole base)

Step-by-Step Method

Step 1: Prepare the Oven and Baking Dish

Preheat your oven to 375°F (190°C). Lightly grease a medium to large casserole dish and set it aside. This ensures nothing sticks and makes cleanup easier later.

Step 2: Cook the Beef

Heat a large skillet over medium-high heat and add a small amount of olive oil or butter. Add the sliced beef in batches so it browns rather than steams. Cook just until the meat is no longer pink, then remove it from the skillet and set aside. Season lightly with salt and pepper.

Step 3: Sauté the Vegetables

In the same skillet, add a little more oil if needed. Add the onions and bell peppers, cooking until they soften and begin to caramelize. If using mushrooms, add them now and cook until their moisture evaporates. Stir in the minced garlic and cook for about 30 seconds, just until fragrant.