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Keto Fajitas with steak, onion and bell pepper in cast iron

Keto Fajitas

Keto fajitas can be made with steak or chicken. Perfect on top of cauliflower rice or eaten alone. This Mexican dish recipe is full of flavor and spices with red and green bell peppers sautéed to perfection!
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Prep Time 10 mins
Cook Time 15 mins
Total Time 25 mins
Course Main Course
Cuisine American, Mexican
Servings 3 serving
Calories 483.9 kcal


  • 1 pound skirt or flank steak
  • 1 sliced red bell pepper
  • 1 sliced green bell pepper
  • 1/2 sliced onion

Fajita Seasoning

  • 1 teaspoon salt
  • 1 teaspoon garlic powder
  • 1/2 teaspoon chili powder
  • 1/2 teaspoon cumin powder
  • 1/4 teaspoon black pepper
  • 2 tablespoon oil for marinade


  • Mix together fajita seasoning in a bowl without the oil. Take out about 1/2 teaspoon of dry seasoning for vegetables. Combine the rest into the 2 tablespoon of oil for the marinade. Quick tip, these measurements are for 1lb of meat. If using more meat make more seasoning.
  • Cover the steak or chicken in the marinade then cover. Overnight is great but 15 minutes will do. When using chicken be sure to use thin chicken.
  • Slice up both bell peppers and onions for cooking. When meat is done marinating start the cooking process.
  • In a cast iron skillet heat to medium/high heat. Add a little oil for cooking them toss in all vegetables. Add saved fajita seasoning to the vegetables and cook until they are tender.
  • After vegetables are done remove them from pan. Turn heat to high and cook and sear the marinated steak until your ideal done temperature. If using chicken, make sure chicken is thin and don't turn up the heat to cook it.
  • At this point you are finished and reasy to serve.


Helpful Recipe Tips

  • Sauté veggies first, I have done this a few times and this is the best method. You can do it in reverse but those dark bits that fall off the steak while searing will be all over your vegetables. It's not a hard rule but something to note.
  • Slicing steak, be sure when using skirt or flank steak you cut against the grain. Otherwise, the steak tenders will be very tough and chewy due to you not cutting against them. How to cut against the grain? Think of a "x" or cross. Look for the lines in the meat and go in the opposite direction when cutting.


Nutrition Facts
Keto Fajitas
Amount Per Serving (1 serving)
Calories 483.9 Calories from Fat 289
% Daily Value*
Fat 32.1g49%
Saturated Fat 10.1g63%
Trans Fat 1g
Cholesterol 119.4mg40%
Sodium 89.7mg4%
Carbohydrates 5.9g2%
Fiber 1.8g8%
Sugar 3.4g4%
Protein 41.3g83%
* Percent Daily Values are based on a 2000 calorie diet.
Keyword Keto Fajitas
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