Keto Low-Carb Philly Cheese Steak Casserole is a quick and easy steak dinner recipe with sirloin steak, cream cheese, green bell peppers, and mushrooms. This is the best steak marinade recipe and you can also use flank steak if you wish. If you are looking for sides to pair with your steak, going the casserole route is perfect! You get everything in one meal prep friendly dish.
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FOR THE FULL LIST OF INGREDIENTS AND COMPREHENSIVE INSTRUCTIONS, PLEASE SEE THE RECIPE CARD AT THE END OF THIS POST. BEFORE YOU SCROLL, THERE’S IMPORTANT INFORMATION IN THIS BLOG POST.
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Calories: 387 Fat: 24G Net Carbs: 5G Protein: 36G
Macros are provided as a courtesy and calculated using MyFitnessPal. Calculate your specific macros using the exact brand ingredients you use and the macros calculator of your choice.
I am a much happier camper if I have my meals prepped for the week in advance. Casseroles make that really easy to do! Simply store this casserole in airtight containers and reheat throughout the week.
Is Steak Good for Keto?
Steak is perfect for keto because it is essentially carb-free! I recommend using grass-fed steaks because grass-fed has a better nutritional impact.
Is Bell Pepper Keto-Friendly?
Half a bell pepper has 3 net grams of carbs. For this recipe, that value is divided among 6 servings.
How Do You Make Garlic Butter Steak?
This Garlic Butter Steak from Taste of Home is amazing.
How Do You Make a Juicy Steak?
The key to a juicy steak is a good marinade and flavorful liquid! Check out my Marinated Steak recipe here.
Is Hummus Good for Keto?
I wouldn’t recommend hummus for ketogenic lifestyles. Avocado will work much better and has macros perfect for keto.
Is This Philly Cheesesteak Casserole Recipe Freezer Friendly?
Yes. I recommend that you remove it from the freezer the night before you plan to eat it. Store it in the fridge overnight so that it defrosts naturally before you reheat.
Here are more Keto Dinner Recipes: Keto Spinach and Cheese Stuffed Chicken and Keto Bacon Cheeseburger Casserole.
Looking for Keto Desserts? You may also enjoy my Keto Peanut Butter Cookies, Keto Chocolate Chip Cookies, Keto Pound Cake, and Keto Cheesecake recipes.
I use Butcher Box sirloin steak in this recipe because it is 100% grass-fed beef. Grass-fed beef is much leaner and has less total fat. It also has more conjugated linoleic acid (CLA), which is linked to reductions in heart disease and cancer.
You may also enjoy my Keto Cheeseburger Casserole and Bacon Egg Spinach Breakfast Casserole recipes.
Keto Low-Carb Philly Cheese Steak Casserole
Ingredients
- 1 1/2 pounds Butcher Box sirloin steak sliced into thin strips
- 1 teaspoon Steak Seasoning I like McCormick's Montreal Steak Seasoning
- salt and pepper to taste
- 1 cup sliced green peppers
- 1 cup mushrooms
- 1 cup onion, chopped
- 2 garlic cloves, chopped
- 2 oz cream cheese
- 1 teaspoon worcestershire sauce
- 2 eggs
- 1/2 cup heavy whipping cream
- 1/2 cup shredded parmesan reggiano cheese
- 4-5 slices provolone cheese sliced into small pieces
Instructions
- Watch the video above for step by step instructions.
- Preheat oven to 350 degrees.
- Add the Butcher Box steak to a skillet on medium-high heat. Season the steak with steak seasoning, salt, and pepper. Cook for 2-3 minutes, flipping both sides of the steak.
- Add the green peppers, onion, garlic, and mushroom to the skillet. Cook until the vegetables are soft and the meat is no longer pink.
- If there is any excess fat in the skillet, drain it. This step is important. If there is excess liquid it will cause the casserole to have a soupy residue underneath.
- Add the Worcestershire sauce and cream cheese. Cook until the cream cheese has melted.
- Remove the skillet from heat.
- In a medium bowl, combine the eggs, shredded parmesan reggiano cheese, and heavy cream.
- Spray an 8 x 11 or 9x9 baking dish (I used 8 x11) with oil or cooking spray. Pour the steak mixture into the dish.
- Drizzle the liquid egg and cheese mixture on top. Top with the provolone cheese slices.
- Bake for 15-20 minutes or until the cheese begins to bubble. Mine was ready around 18.
- Cool before serving.
Jane Saunders
Wow, this looks very indulgent and tasty. Love the Worcestershire sauce in there.
Jayde
I eat keto/ low carb. My boyfriend “refuses” to eat keto. However, since I found this website and various recipes, I’ve been sneaking in a few keto/ low carb recipes a week. This Philly Cheesesteak is his absolute favorite. And I love it too. It is so good, flavorable, and honestly you don’t even miss the bread. I’ve made it about 3 times now. But could make it every night. It’s quick to put together and the ingredients arent expensive.
staysnatched
Awesome! I’m so glad you can sneak it in on him!
Liz
My dad loves philly cheese steaks so even though he’s not paleo, this is his kind of recipe! Thanks for sharing!
Aimee Shugarman
This is our new favorite dinner recipe!!
Julie
I love all of the flavors in this dish and that steak definitely looks delicious This is a dish anyone would love regardless of their diet plan and a sure winner for the Keto folks too!
Jennifer
Do you know the macros for this by chance? Thank you!
staysnatched
Yes, I document them at the top of every recipe post. Scroll up. Thanks!
Elizabeth
This was so delicious & easy to make!!!
staysnatched
I’m glad you enjoyed it!
Ashlee
My new favorite Keto recipe! I made this tonight and its delicious! Even my super picky kids approved. Thanks for sharing this!
Diane
I substituted one pound of thick sliced Boars Head London Broil for the steak. I used six thin slices of provolone. This was one of the best recipes I’ve ever made! Thanks for sharing!
staysnatched
What an honor! I’m so glad you enjoyed the recipe.
Lisa Hurtubise
I”m making this dish right now. It’s in the oven and my house smells soooooo good! I can’t wait to taste it! Thanks for the recipe! ~Lisa, North Bay, Ontario, Canada
staysnatched
I hope you enjoyed it!
Jason
I would like to freeze this. How long will it last in the freezer?
staysnatched
I would recommend a couple of weeks. You can test to see if it will last longer.
Anonymous
How many carbs a serving
staysnatched
It’s noted at the top of the post.
Robert
We have a new family dinner favorite! Thank you!
Keith
Just tried this, but I only had mozzarella on hand, omg it was amazing, I can’t wait to try it with the good cheeses!!
staysnatched
Wonderful! Glad you enjoyed it.
Davis
How’s many servings for this dish?
Michele
This was simple to make and delicious to eat!! I’m going to make this again soon! Next time, I might add some zucchini. Thanks for sharing this recipe!!
staysnatched
You’re welcome. Zucchini sounds like it would be amazing!
Leigh
I made this tonight, a couple subs because I didn’t have the same cheese. Even my non-Keto friend loved it! Kudos!
staysnatched
Yay! So happy you liked it!
J. Gard
If I was going to freeze this dish would I bake it and then freeze or prep it, freeze it, then bake later?
staysnatched
I would cook it first and then freeze.
Bobbette Kaufman
I made this tonight it is absolutely amazing can’t wait for my husband to get home and try it thank you so much for sharing this wonderful recipe with the world
Wish I could give it a million star rating
staysnatched
Omg thank you! I’m so glad you enjoyed it!
ERIN NJOROGE
Hi wonderful recipe. I just finished eating! Question about the kcal. Is that 387 kcal for the whole recipe or per serving?
Thanks!
staysnatched
Hi! It’s per serving.
SFASTW
I’ll be trying this tonight with a few substitutes because I don’t have everything listed but can make due.. reading comments and that’s helpful.. going to try the zucchini
staysnatched
Sounds great! Let me know what you think!
Tori
Was wondering if I should cook, then refrigerate and warm up or if it’ll be fine to sit in egg mixture for a few hours. I usually prep and then wait to put in over until I get home from work.
staysnatched
I wouldn’t let it sit in the egg mixture.
Justin
What could I use instead of egg for this recipe? I got an egg allergy almost 10 years ago after eating them for like 18 years.
staysnatched
What do you normally substitute for your egg allergy? You can try that. Eggs are used to bind the casserole.
Teresa
I made it without the eggs and it was delicious. It didn’t have the same texture, but that didn’t matter to me.
staysnatched
Thank you!
Justin
I normally avoid eggs when eating. They usually don’t bother me in baked goods or like mayo. It’s usually straight egg
Cathy
Can I use steak-ums instead of steak? Because of COVID-19 Walmart is out of meat & others steaks are either to expensive or a bad cut.
Thank you
staysnatched
I don’t know what steak-ums are. You can use any meat you want.
Carol Needham
This recipe is fantastic. I used the great value philly cheesesteak meat that you get at Walmart in freezer section in the meat dept. I doubled the recipe with 2 boxes and used a 13×9 inch pan. It was literally FANTASTIC! I would of rated it higher if I could of. Also very easy to prepare.
staysnatched
Awesome! I’m glad it worked out!
Amanda
Hi if I used 2 pounds of steak can u tell me the measurements for the rest of ingredients please. Making for my family tonight don’t want to mess up. Thanks!
staysnatched
You would increase the serving of the ingredients by 1/3rd.
Amanda
I’m so glad I came across this recipe. I tweaked it a bit and added my own seasonings, used a blend of parmesan and asiago and added fresh cauliflower, I eyeball everything, but added an extra egg and a bit more of the heavy cream. It came out amazing!
staysnatched
Glad you enjoyed it.