Low Carb Steak Fajita Skillet

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Enjoy the flavor of your favorite fajitas without the high carb count with this amazingly easy to make Low Carb Steak Fajita Skillet. 

Easy Low Carb Steak Fajita Skillet

I’m all about easy dinner ideas, and this low carb steak fajita skillet is exactly that! We recently purchased 1/4 of a cow and I am loving all of the tender cuts of meat. Generally speaking, I don’t purchase a lot of beef other than roasts and ground beef. On occasion I will purchase steaks if they are on sale, but it’s very rare I buy other cuts of beef.

Easy Low Carb Steak Fajita Skillet

With our 1/4 cow, I’ve started cooking our meals with different cuts like round steak and skirt steak. So instead of making chicken fajitas, we’ve graduated to steak fajitas and no one is complaining.

Easy Low Carb Steak Fajita Skillet

Making this low carb skillet is so easy and takes only about 30 minutes, including prepping the steak and veggies!

Tips for making this Keto friendly Steak Fajita Skillet Dinner

  • Cast iron is key! I find that I’ve gotten the best results and the most flavorful steak when using my trusty Lodge Cast Iron Skillet. While my stainless steel works OK, I can get a higher heat to sear the steak in the cast iron. Getting a good crust on the meat before turning the heat lower will give you a more tender steak result and more flavor.
  • Choose a good cut of beef for the most tender steak fajita pieces. Using a skirt steak and slicing it against the grain into thin strips works best (I’ve found). I’m not an expert when it comes to cuts of meat, but have found that I like this method best.
  • Don’t over cook the veggies. Sure it might sound like a no brainer, but over cooking the peppers and onions doesn’t do this dish any favors. Cook them just until they start to get tender, then remove them from the pan before adding the steak. Once the steak has finished cooking, add the veggies back in just long enough to finish cooking while you add the cheese and melt it over top.
  • We prefer to eat our steak fajita skillet meal over cauliflower rice that has been seasoned with fajita or homemade taco seasoning. It’s filling, flavorful and delish! You could also eat this dish as traditional steak fajitas on a low carb tortilla, or with low carb tortilla chips.
Easy Low Carb Steak Fajita Skillet

What to serve with Low Carb Steak Fajita Skillet

We prefer to eat ours over Cauliflower Rice or on a bed of lettuce for a yummy fajita salad! Topping the steak fajita skillet with Homemade Salsa, guacamole and/or sour cream adds some extra fat and flavor do the dish too! If you need a little crunch, try making some homemade low carb tortilla chips, or use pork rinds to scoop up the steak fajitas.

Easy Low Carb Steak Fajita Skillet

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Easy Low Carb Steak Fajita Skillet

Low Carb Steak Fajita Skillet

Yield: 4
Prep Time: 10 minutes
Cook Time: 20 minutes
Total Time: 30 minutes

Enjoy the flavor of your favorite fajitas without the high carb count with this amazingly easy to make Low Carb Steak Fajita Skillet. 


  • 2 tbsp butter, divided
  • 1/2 cup red pepper, sliced into strips
  • 1/2 cup green pepper, sliced into strips
  • 1/2 cup yellow pepper, sliced into strips
  • 1/2 cup red onion, sliced into strips
  • 1 tsp minced garlic
  • 2 lbs skirt or flank steak, sliced into thin pieces
  • 2 tbsp fajita seasoning
  • 1 cup shredded cheese
  • 4 tbsp guacamole, for topping
  • 4 tbsp sour cream, for topping


  1. Season steak slices with fajita seasoning, set aside
  2. Heat 1 tbsp butter in a cast iron skillet over medium heat
  3. Add in peppers, onion and minced garlic and saute on medium heat for 3-5 minutes, just until veggies get tender
  4. Remove veggies from skillet, place on a plate and set aside.
  5. Melt remaining tbsp butter in cast iron skillet. Add in seasoned steak and cook on high, to sear the steak on both sides. 
  6. Turn down heat to medium-low and continue cooking steak until no longer pink.
  7. Stir in steak fajita veggies and cook for another minute.
  8. Remove low carb steak fajita skillet from heat and top with shredded cheese.
  9. Place lid over skillet and let stand for about 5 minutes, allowing cheese to melt.
  10. Serve with guacamole, sour cream, and low carb tortilla chips
Nutrition Information
Yield 4 Serving Size 1 cup
Amount Per Serving Calories 517Total Fat 28gSaturated Fat 13gUnsaturated Fat 0gCholesterol 179mgSodium 359mgCarbohydrates 7gFiber 2gSugar 2gProtein 56g

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  1. what is 1 gram in cups? (Yield 4…Sering Size 1 gram? This recipe sounds so good and great for a Diabetic, but I need what it is in cup to for the 7g of carbohydrates.

    Thank You Christine

    1. Hi Christine! Sorry for the confusion! The recipe cards automatically put 1 gram as the serving size and I guess I forgot to change it. A serving is 1 cup!

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