Prep Time: 20 minutes
Cook Time: 35 minutes
Total Time: 55 minutes
Servings: 6
Cooking Intensity: Easy

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Philly Cheesesteak Casserole: All the Flavor, None of the Fuss

Craving the iconic, savory goodness of a Philadelphia cheesesteak but want a simpler, fork-and-knife kind of meal? This Philly Cheesesteak Casserole is your answer. We’ve deconstructed the beloved sandwich and transformed it into a hearty, bubbling bake that’s perfect for a weeknight dinner or a comforting weekend feast.

By combining thinly sliced steak with classic bell peppers and onions, then smothering it all in a decadently creamy cheese sauce, this casserole captures the soul of the original. It’s a crowd-pleaser that requires minimal effort and delivers maximum flavor. Say goodbye to stuffing sandwiches and hello to the easy, cheesy delight of this unforgettable casserole.

The Flavor Profile & Recipe Story

The magic of a Philly Cheesesteak lies in its simplicity: high-quality beef, a soft roll, and the holy trinity of melted cheese, onions, and peppers. This casserole honors that tradition while offering a practical twist. It’s a fantastic way to feed a family without standing over the stove, and the ingredients are easy to keep on hand for a last-minute dinner win.

The result is a rich, savory, and deeply satisfying dish where the tender steak mingles with the sweet, soft vegetables, all bound together by a gooey, sharp cheese sauce. Every spoonful is a perfect bite of comfort.

Ingredients

For the Casserole Base:

• 1.5 lbs ribeye steak or sirloin, thinly sliced against the grain

• 1 large yellow onion, thinly sliced

• 1 green bell pepper, thinly sliced

• 1 red bell pepper, thinly sliced

• 2 cloves garlic, minced

• 2 tablespoons olive oil

• 1 teaspoon Worcestershire sauce

• Salt and black pepper, to taste

For the Cheese Sauce:

• 2 tablespoons unsalted butter

• 2 tablespoons all-purpose flour

• 1.5 cups whole milk

• 8 oz provolone cheese, shredded (divided)

• 4 oz cream cheese, softened

• ½ teaspoon garlic powder

• ¼ teaspoon smoked paprika (optional)

For the Topping:

• 1 cup shredded mozzarella cheese

• Fresh parsley, chopped (for garnish)

Equipment You’ll Need

• Large, oven-safe skillet (or a 9×13 inch baking dish)

• Medium saucepan

• Whisk

• Cutting board and sharp knife

• Measuring cups and spoons

Step-by-Step Instructions

Step 1: Prepare and Cook the Vegetables & Steak

1. Preheat and Prep: Preheat your oven to 375°F (190°C). Pat the thinly sliced steak dry with a paper towel and season generously with salt and pepper.

2. Sauté Aromatics: Heat the olive oil in a large, oven-safe skillet over medium-high heat. Add the sliced onions and bell peppers. Cook for 6-8 minutes, stirring occasionally, until they have softened and developed a slight char. Add the minced garlic and cook for one more minute until fragrant.

3. Cook the Steak: Push the vegetables to one side of the skillet. Add the seasoned steak slices to the empty side in a single layer. Sear for 2-3 minutes per side until browned. Avoid stirring too much to get a good sear. Pour in the Worcestershire sauce and stir everything together to combine. Remove the skillet from the heat.

Step 2: Create the Creamy Cheese Sauce

1. Make the Roux: While the vegetables and steak are cooking, melt the 2 tablespoons of butter in a medium saucepan over medium heat. Once melted, whisk in the 2 tablespoons of flour. Cook for about 1 minute, whisking constantly, until the mixture is bubbly and golden. This is your roux.

2. Whisk in Milk: Gradually pour in the milk, whisking constantly to prevent any lumps from forming. Continue to cook and whisk for 3-5 minutes until the sauce thickens and can coat the back of a spoon.

3. Add Cheeses: Reduce the heat to low. Stir in the softened cream cheese and 6 oz of the shredded provolone cheese until the sauce is smooth and creamy. Stir in the garlic powder and smoked paprika (if using). Season with a pinch of salt and pepper.

Step 3: Assemble the Casserole

1. Combine: Pour the creamy cheese sauce directly over the steak and vegetable mixture in the skillet. Stir gently until everything is evenly coated.

2. Top with Cheese: Sprinkle the remaining 2 oz of provolone cheese and the 1 cup of mozzarella cheese evenly over the top.

Step 4: Bake to Perfection

1. Bake: Transfer the oven-safe skillet to the preheated oven. Bake for 20-25 minutes, or until the casserole is hot and bubbly, and the cheese on top is melted and beautifully golden brown.

2. Broil (Optional): For an extra-bubbly, spotty-brown top, switch the oven to a high broil for the final 1-2 minutes. Watch it closely to prevent burning!

Step 5: Serve and Enjoy

1. Rest: Carefully remove the casserole from the oven and let it rest for 5 minutes before serving. This allows the sauce to set slightly.

2. Garnish: Sprinkle with freshly chopped parsley for a pop of color and freshness.

3. Serve: Scoop generous portions onto plates and enjoy this ultimate comfort food! It’s fantastic on its own or served with a simple side salad or crusty bread to soak up every last bit of the cheesy sauce.

Nutrition Information (Per Serving)

• Calories: ~625 kcal

• Carbohydrates: 15g

• Protein: 42g

• Fat: 44g

• Saturated Fat: 22g

• Cholesterol: 145mg

• Sodium: 680mg

• Fiber: 2g

• Sugar: 8g

Please note: Nutritional information is an estimate and will vary based on the specific brands of ingredients you use.

Recipe Notes & Tips for Success

• The Steak is Key: For the most tender bite, ensure your steak is sliced as thinly as possible. Partially freezing the steak for 30-60 minutes makes this much easier.

• Cheese Variations: While provolone is classic, feel free to use a combination of cheeses. Sharp white cheddar, Cheez Whiz for authenticity, or even American cheese all work wonderfully.

• Make it Ahead: You can assemble the entire casserole (without baking) up to a day in advance. Cover tightly and refrigerate. When ready to eat, bake for 30-35 minutes, or until heated through.

• Mushroom Lover’s Twist: Add 8 oz of sliced mushrooms when you sauté the peppers and onions for an extra layer of savory, umami flavor.

• Storage: Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the microwave or a 350°F oven until warm.