Creamy, meaty, and loaded with all the flavors of a Philly cheesesteak sandwich, this Keto Philly Cheesesteak Casserole is a must-try for anyone who loves good, hearty and easy dishes! Follow me, Chef Jenn, and I’ll show you all my best tips and tricks for making this amazing keto beef casserole recipe perfectly every time!
Casseroles aren’t just for winter anymore, and with a tasty dish like this 6 net carb keto and low-carb Philly Cheesesteak Casserole, you can dine on something creamy, hot and delicious, all-year long.
I made the mistake of letting my kids try this, then they promptly declared they were eating keto now, too, just to get this casserole for dinner!
I let them have some with pasta, but of course, I ate mine just as it was with a simple side of Zucchini Spaghetti, and loved every bite of it. Next time, I’ll make a double batch!
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This keto Philly Cheesesteak Casserole is filled with all the familiar flavors of a Philly cheesesteak sandwich, but with none of the carbs! It’s all there – cheese, onions, mushrooms, peppers, and of course, tender beef.
It also has the benefit of being a one-pot meal! Then, after just a quick trip in the oven to melt (more) cheese and get it nice and hot, it’s ready to eat. If you’re looking for another tasty casserole, check out this keto Chicken Pot Pie Casserole!
Keto Philly Cheesesteak Casserole Substitutions
I used thinly shaved Philly-style beef. It was ribeye, but there are other cuts available. Some grocery stores sell this thinly shaved raw beef in the frozen section, or you may be able to ask the butcher to help you.
If you can’t find the thinly shaved beef, you can use ground beef for a similar flavor.
I used red bell peppers because I wanted a bit of color in the dish, but green bell peppers are just fine and will save you a few carbs. You can also switch up the cheese. I used shredded provolone on top, but any mild cheese will do, even mozzarella!
I baked these in cute individual-size casserole dishes, but any oven-safe dish will do. You just want lots of surface area for that cheese to get brown and bubbly.
Pretty easy, right? Easy enough for a weeknight dinner? You bet! For a step-by-step look at the process, click on the gallery or scroll down for the recipe and a pinnable image for your Pinterest cookbook.
How To Make Philly Cheesesteak Casserole
Get everything ready. Wash and slice your veggies, including the mushrooms.
Shred your own cheese to avoid the starch that shredded cheese often contains.
If using raw beef, brown it in a pan. Then add your veggies.
Add the beef broth and cream cheese right to the pan. Season with garlic, salt and pepper.
Combine with the cream, and let it simmer, then transfer it to an oven-safe dish.
Top with cheese and bake, that’s it!
Chef’s Tips
- You can make this dish ahead of time, all the way up to baking it in the oven.
- Save money by cooking a roast and slicing it thinly instead of buying prepared and pre-packaged beef.
- Use fresh veggies, not frozen, for a better texture.
- Save a few more pennies by using green peppers instead of red.
What To Serve with Keto Philly Cheesesteak Casserole
This dish tastes great with simple Cauliflower Rice, or another simple veggie dish like Zucchini Noodles. A green salad with your favorite keto dressing would also be a good choice.
Can you Freeze Philly Cheesesteak Casserole?
Yes! You can freeze this tasty keto casserole recipe one of two ways:
Prepare it right up to the point where it goes into the oven (without the cheese) and freeze the mixture in an air-tight container or freezer bag for up to three months.
Simply defrost it in the fridge overnight, top it with cheese and bake as usual.
Or, bake it and fully chill it in the fridge overnight. Wrap it in the baking dish in a layer of plastic wrap, then wrap it in foil. Remove the wrapping before thawing and baking.
It only takes about 15 minutes to prep, and about 15-20 minutes to bake.
Absolutely! Feel free to add/swap your favorite veggies.
Absolutely! Use whatever cheeses you like, or no cheese at all!
Also Try…
Ingredients. 
Cook beef and onions in a touch of oil. 
Prep the veggies. Add the mushrooms to the cooked beef and onions. Add the peppers. Add garlic powder, beef broth, and cream cheese. 
Add the cream and simmer a minute or two. 
Top with cheese and bake until bubbly!
Philly Cheesesteak Casserole
Ingredients
- 1 lb thinly shaved ribeye beef
- 8 ounces mushrooms quartered
- 1/2 cup onion sliced
- 1 cup bell peppers sliced
- 1 tbsp cooking oil
- 1 tbsp garlic powder
- 1 cup beef stock low sodium or unsalted
- 1 cup heavy cream
- 4 ounces cream cheese softened
- 1 cup provolone cheese shredded
Instructions
- Heat the oil in a large skillet over medium-high heat. Add the onions and the beef, and cook 3-5 minutes until the onions are translucent. Drain any accumulated liquid.
- Add the mushrooms and continue cooking another 3-4 minutes until mushrooms are softened. Add the bell pepper.
- Turn the heat down to medium and add the beef stock, garlic powder, and cream cheese. Stir well until the cream cheese has melted and mixed with the other ingredients. Add the cream and heat through until just boiling. Check for salt and pepper, adding if necessary.
- **Optional. Thicken the liquid with 1 tbsp of cornstarch mixed with 2 tbsp of cold water. Add this to the simmering liquid, stirring well to combine. This will add an extra 1.5 carbs per serving.
- Pour the mixture into an oven-safe casserole (or individual casseroles) and top with the shredded cheese. Heat under the broiler for 3 minutes or until bubbly and brown on top. Enjoy!
Video
Nutrition
A Note on Nutritional Information
Nutritional information for this recipe is provided as a courtesy and is calculated based on available online ingredient information. It is only an approximate value. The accuracy of the nutritional information for any recipe on this site cannot be guaranteed. Erythritol carbs (sugar substitutes) are not included in the carbohydrate counts as they have been shown not to impact blood sugar, and they have zero calories and zero carbs. Net carbs are the total carbs minus fiber.
Want even more keto deliciousness? Check out these keto soups and chowders, keto grilled veggies, and for breakfast, keto egg bites. Wash it all down with a keto cocktail!
You kids are funny, but I’d switched to a keto diet in a heartbeat too if it means yummy dishes like this everyday. 🙂
Ya, nobody is suffering from lack of good food in my house!
Sounds like a hearty and tasty dish! A yummy mix of flavors.
What a great idea to put a philly cheesesteak into a casserole!! I love this idea
Hope you get to try it!
What a comforting meal for the winter! I know my family would absolutely love this and it’s wonderful to have a naturally low-carb recipe on hand.
This casserole is awesome. I love how cheesy it is!
Philly Cheesesteak is simple the best! love how this is in casserole form without the bread!
Oh so tasty and delicious – I don’t blame your kids for wanting to switch to keto. You’ve convinced me just about also! A superb dish 🙂
Really delicious! A new favorite meal at my house!
Thin sliced London broil would probably work also. May be cheaper than ribeye.
Great suggestion! Thanks!
What a genius idea to make a casserole with philly cheesesteak. It looks colorful, cheesy and so inviting. I probably get on keto-diet too 🙂
Yum! This looks so delicious and flavor filled! I can’t wait to make this!
Looks so easy to make and so delicious! Perfect family meal.
One of my favorite casserole recipes! So comforting!