Here is a Philly Cheesesteak Casserole that is ooey-gooey cheesy and packed with flavor, with a combined prep and cook time of just under 30 minutes.
This budget friendly recipe is made using simple ingredients and perfect to feed a hungry crowd.
If you love easy weeknight meals, try our keto taco pie and Keto Meatballs.
For more ideas, check out our list of easy keto dinner recipes with ground beef.
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Why you'll love this recipe
This casserole is a one-pot wonder, which means minimal clean-up.
Low net carbs with all the flavors of a traditional Philly cheesesteak sandwich.
There are so many ways to serve this recipe. Opt for keto-friendly tortilla chips to enjoy your casserole "nacho-style" by scoping up the cheesy goodness with these chips.
For meat lovers, also try our big mac salad and sirloin tip steak.
Key ingredients
Sirloin Steak - Select a good quality sirloin steak that is well-marbled.
Beef Broth - Choose a low-sodium beef broth to control the overall saltiness of the recipe.
Worcestershire Sauce - This is a signature ingredient in Philly cheesesteak recipes. Don’t skip it!
Provolone Cheese - An even layer of this cheese results in a delicious golden-brown topping.
If you have any questions about this easy casserole recipe, please leave a comment below and we will get back to you.
Variations
- Instead of sirloin, use other cuts of tender beef like ribeye steak or flank steak. Ribeye is extra rich and even more marbled. Flank steak is a little leaner.
- Swap out sliced steak for lean ground beef. Brown the ground beef before layering.
- Add sautéed mushrooms to the vegetable mix.
- Bring some heat by mixing in sliced jalapeños or red chili flakes.
- Embrace the true Philly experience by adding chopped pickled hot peppers, or cherry peppers to your casserole.
For another one-pot meal try our instant pot crack chicken.
How to make this Philly Cheesesteak Casserole
Step 1: Preheat the oven to 350 degrees F. Heat half of the olive oil over medium-high heat in an oven-safe skillet. Add the thinly sliced beef; season it, and saute it until browned.
Step 2: Remove the steak and set aside. Add the onion and bell peppers to the skillet, season with salt and pepper, and cook for 3-5 minutes, until softened. Add in the garlic and cook for 30-60 seconds.
Step 3: Stir in the broth and Worcestershire sauce. Return the beef to the pan, then layer the American cheese on top of everything.
Step 4: Cover the pan and simmer, allowing the cheese to melt, then remove the lid and stir it into the beef and veggies. Reduce the heat to medium and let it simmer until the sauce thickens.
Step 5: Sprinkle the top with chopped tomatoes, then sprinkle or layer on the provolone cheese. You can also transfer the mixture to a casserole dish at this point.
Step 6: Bake for 10-15 minutes until the cheese is melted and the casserole is heated through. Broil for 2-3 minutes for a golden brown top.
For the complete list of ingredients and instructions, please see the printable recipe card below.
Don't forget dessert! Try our No Bake Keto Cheesecake and our Keto Chocolate cake. If you don't need to eat keto, try our No Bake Biscoff Cheesecake.
Expert tips
When cutting the steak, aim for thin slices. Thin slices ensure the beef cooks quickly and evenly in the skillet and casserole.
A quick sear is enough, as your steak will still be heated in the oven. Do not overcook while browning it in the skillet.
Make sure to broil for the last 2-3 minutes. You need that broil element to achieve golden and bubbly result.
We like to rest this casserole dish before serving it. This allows the cheese to cool which makes serving and cutting easier.
FAQs
Provolone is the most popular choice for a Philly. But if you want to try other cheeses go with ones that melt well like cheddar, brie, mozzarella, Swiss, or blue cheese.
We like to pair this meal with something green like a broccoli salad or zucchini noodles. You can also use keto rolls and make an actual sandwich.
Storage instructions
Once fully cooled, refrigerate in an airtight container for up to 4 days.
Reheating in the oven is the best option for this dish. Preheat your oven to around 350°F (175°C). Cover the dish with aluminum foil to stop the top from browning or drying out too quickly. Reheat for about 15 minutes.
Reheat on the stovetop with a little water or broth to the bottom of the pan to create steam and prevent sticking.
You can use the microwave to reheat if you're short on time. The texture will not be as crisp as when reheated in the oven.
It's worth noting that this Philly Cheesesteak Casserole doesn't freeze well. Freezing can alter the texture of the cheese and vegetables upon thawing and reheating.
Other Delicious, Easy Casserole Recipes
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📖 Recipe
Philly Cheesesteak Casserole with Steak
meaty, cheesy, and packed with flavor. This one pot versatile dish is easy to prepare and delicious to serve.
Equipment
Ingredients
- 1 tablespoon olive oil divided
- 2 pounds sirloin steak thinly sliced
- ½ teaspoon salt or to taste
- ¼ teaspoon black pepper
- 1 small red onion diced
- 2 bell peppers diced
- 1 teaspoon minced garlic
- ½ cup beef broth
- 2 teaspoons Worcestershire sauce
- 8 sliced American cheese
- 1 tomato diced
- 2 cups provolone cheese shredded
Instructions
- Preheat the oven to 350F. In a large oven-safe skillet, heat half of the olive oil over medium-high heat.
- Add the thinly sliced beef; season with salt and pepper to taste and saute until browned. Remove from the pan and set aside.
- Add the onion and bell peppers to the skillet, season with salt and pepper, and cook for 3-5 minutes, until softened. Add the garlic and cook for 30-60 seconds.
- Add the beef broth and Worcestershire sauce and stir. Return the beef to the pan, then layer the American cheese on top of everything. Cover the pan and simmer, allowing the cheese to melt, then remove the lid and stir it into the beef and veggies. Reduce the heat to medium and allow it to simmer down a bit, until the sauce thickens.
- Sprinkle the top with chopped tomatoes, then sprinkle or layer on the provolone cheese. You can also transfer the mixture to a casserole dish at this point.
- Bake for 10-15 minutes, or until the cheese is melted and the casserole is heated through. Broil for 2-3 minutes for a golden brown top.
Notes
- Thinly sliced steak is best. Cooks evenly and easier to eat.
- Broil for the last 2-3 minutes to achieve a golden top.
- Rest for a few minutes once it is out of the oven to make cutting and serving easier.
- Store any leftovers in an airtight container. This will prevent it from drying out and keep the flavors locked in. Store in the refrigerator for 4 to 5 days.
- Reheating in the oven is the best option for this dish. Preheat your oven to around 350°F (175°C). Cover the casserole dish with aluminum foil to stop the top from browning or drying out too quickly. Reheat for about 15-20 minutes.
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