Philly Cheesesteak Casserole brings all the bold, savory flavors of the iconic sandwich into one cozy, oven-baked dish that is easy to make, incredibly satisfying, and perfect for family dinners. With tender beef, sautéed onions and peppers, and layers of gooey melted cheese, this casserole delivers everything people love about a classic cheesesteak—without the hassle of sandwiches or the need for bread.
This Philly Cheesesteak Casserole is rich, hearty, and comforting, yet simple enough for busy weeknights. It works beautifully for low-carb lifestyles, meal prep, or feeding a hungry crowd. Best of all, it comes together with everyday ingredients and just a few easy steps.
I first made this casserole on a night when everyone wanted comfort food but nobody wanted dishes piling up. The smell of beef and onions sizzling together filled the kitchen, and once the casserole came out of the oven bubbling and golden, it was clear this one was a keeper. Since then, Philly Cheesesteak Casserole has become one of those dependable recipes that never fails to please.
Ingredients
Equipment
Method
- Preheat oven to 375°F and grease a 9×13-inch baking dish.
- Cook onions, peppers, and mushrooms in olive oil until tender. Set aside.
- Brown beef in the same skillet and season.
- Mix cream cheese and mayonnaise until smooth, then combine with beef and vegetables.
- Transfer to baking dish, top with cheeses, and bake until bubbly and golden.
Nutrition
Notes
Tried this recipe?
Let us know how it was!Why Philly Cheesesteak Casserole Belongs on Your Menu
All the flavor of a classic sandwich
Philly Cheesesteak Casserole captures the essence of the original sandwich. Savory beef, sweet onions, tender peppers, and rich cheese come together in every bite. The flavors are familiar and comforting, yet the casserole format makes it even easier to enjoy.
Because everything bakes together, the flavors blend beautifully and create a creamy, cohesive dish that feels indulgent without being complicated.
Perfect for busy weeknights
This casserole is ideal when time is short. The beef and vegetables cook quickly, and the oven does the rest of the work. Cleanup is minimal, and leftovers reheat exceptionally well.
It is also flexible. You can adjust the ingredients based on what you have on hand without sacrificing flavor.
A Cozy Family Favorite
There is something about a bubbling casserole that instantly signals comfort. Philly Cheesesteak Casserole has that effect. It is the kind of dish that brings everyone to the table without much convincing.
This recipe reminds me of casual family dinners where everyone serves themselves straight from the baking dish, conversations linger, and plates come back empty. It is not fancy, but it feels special in the way only homemade comfort food can.
Ingredients That Make Philly Cheesesteak Casserole Shine
Beef as the foundation
Thinly sliced beef is traditional for cheesesteaks, and it works perfectly here. Ribeye, sirloin, or even deli-style roast beef all work well. Browning the beef properly builds deep, savory flavor that carries through the entire casserole.
Ground beef can also be used for a more budget-friendly option.
Onions, peppers, and mushrooms
These vegetables add sweetness, texture, and balance. Onions caramelize slightly, peppers soften and mellow, and mushrooms contribute a rich, meaty depth that complements the beef beautifully.
A creamy cheese mixture
Cream cheese and mayonnaise form a rich, creamy base that binds everything together. Provolone provides classic cheesesteak flavor, mozzarella adds stretch and melt, and Parmesan brings a subtle savory edge.
The result is a casserole that is creamy without being heavy and cheesy without being greasy.
How Philly Cheesesteak Casserole Comes Together
Cooking the beef and vegetables
Start by heating olive oil in a large skillet. Add the onions, peppers, and mushrooms, cooking until softened and lightly browned. Remove them from the skillet and set aside.
In the same skillet, cook the beef until browned and just cooked through. Season well to build flavor.
Mixing the creamy layer
In a bowl, combine softened cream cheese, mayonnaise, and seasonings until smooth. This mixture creates the rich texture that makes the casserole so comforting.
Assembling the casserole
Combine the beef, vegetables, and cream cheese mixture, then spread everything evenly into a baking dish. Top generously with shredded provolone, mozzarella, and Parmesan.
Baking to bubbly perfection
Bake until the cheese is melted, golden, and bubbling. Let the casserole rest briefly before serving so it sets slightly and slices cleanly.
Tips for the Best Philly Cheesesteak Casserole
Slice ingredients evenly
Even slices of beef and vegetables ensure consistent cooking and better texture.
Do not overcook the beef
The beef finishes cooking in the oven, so cook it just until browned to keep it tender.
Let it rest before serving
A short rest helps the casserole firm up and makes serving easier.
Easy Variations to Try
Low-carb classic
Serve as written for a satisfying low-carb meal.
Sandwich-style casserole
Add a layer of toasted hoagie rolls at the bottom if you want a bread-based version.
Spicy twist
Add sliced jalapeños or extra red pepper flakes for heat.
Cheese swap
Swiss, cheddar, or pepper jack work well for a different flavor profile.
How to Serve Philly Cheesesteak Casserole
This casserole is a complete meal on its own, but it also pairs well with a simple green salad or roasted vegetables. For non-low-carb eaters, it is delicious with crusty bread on the side.
Leftovers make an excellent lunch and reheat beautifully.
Storage and Make-Ahead Tips
Store leftovers in an airtight container in the refrigerator for up to four days. This casserole also freezes well for up to two months.
Reheat gently to preserve the creamy texture.
Frequently Asked Questions
Can I use ground beef instead of sliced beef?
Yes, ground beef works well and is more budget-friendly.
Is this casserole keto-friendly?
Yes, it is naturally low in carbs.
Can I make it ahead of time?
Yes, assemble it ahead and bake when ready.
Does it reheat well?
Yes, it reheats evenly and stays creamy.
Can I skip mushrooms?
Absolutely, they are optional.
Conclusion
Philly Cheesesteak Casserole is comfort food at its best. Cheesy, hearty, and full of classic flavor, it takes everything people love about a cheesesteak and turns it into an easy, family-friendly dinner. Once you make it, this casserole is sure to earn a permanent spot in your meal rotation.
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