Low Carb Steak Fajitas

Low Carb Steak Fajitas are tender, juicy and full of flavor! Best of all, this easy recipe comes together super quick and perfect for busy weeknights. Marinated in a homemade fajita spice blend and cilantro lime marinade.

Fajitas happen a lot around here. Chicken, Shrimp and these Low Carb Steak Fajitas.

They are actually really simple to make. The best part? Everything cooks up in just one pan in under 30 minutes. We love this recipe because you can make it anytime you feel like throwing a Mexican fiesta or during a busy weeknight.

And these Low Carb Steak Fajitas are easy to customize with your favorite protein.

HOW TO MAKE THESE LOW CARB STEAK FAJITAS

• Start off by making the homemade fajita seasoning. It’s a blend of chili powder, cumin, smoked paprika, onion powder, garlic powder, salt and black pepper. Or if you already have a favorite brand of fajita seasoning, you can certainly use that instead.
• Combine the olive oil, lime juice, cilantro, mustard and fajita seasonings for the steak marinade. Pour the marinade over the steak reserving 1 tablespoon for drizzling at the end.
• Cut the onions and bell peppers into thin slices
• Heat a large 12″ skillet over medium high heat and cook the onions until soft and fragrant, then add the bell peppers. If you like them with a nice crunch – cook for about 3-5 minutes. And if you like them softer, leave them on for about 3 minutes longer. Transfer and set aside on a plate.
• Melt butter on the same skillet and sear the steak. Allow to sear for 3 to 4 minutes (or more depending on how done you like your steak) on each side. Transfer steak to a cutting board and allow to rest for at least 5 minutes before slicing into thin strips. Add the reserved steak marinade to the skillet and add the steak strips until just heated. Remove from heat.

WHAT SHOULD I SERVE THESE STEAK FAJITAS WITH?

You can serve these delicious fajitas with low carb tortillas, coconut wraps, as a salad or over some cauliflower rice.

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SOME HELPFUL RECIPE AND MEAL PREP NOTES:

• add more chili powder and some red chili flakes if you prefer more heat
• make ahead by slicing the vegetables the night before
• if you have time, marinate steak overnight for even more flavor

These Easy Steak Fajitas also be made ahead of time for meal prep Sunday.

Divide everything out into lunch containers to enjoy them throughout the week.

5 from 3 votes

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Low Carb Steak Fajitas

Skillet Steak Fajitas are tender, juicy and full of flavor! Best of all, this easy recipe comes together super quick and perfect for busy weeknights. Marinated in a homemade fajita spice blend and cilantro lime marinade.

Course Main Course

Cuisine Mexican

Prep Time 12 minutes

Cook Time 15 minutes

Total Time 27 minutes

Servings 4 servings

Author Kelly

Ingredients

For the fajita seasoning:

• 2 teaspoons chili powder
• 1 teaspoons cumin
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon smoked paprika
• 1/2 teaspoon salt or to taste
• 1/4 teaspoon black pepper or to taste

For the fajitas:

• 3 tablespoons olive oil divided
• 1/4 cup fresh cilantro leaves chopped plus more for serving
• juice from 2 limes divided
• 1 tablespoon Dijon mustard paleo/keto brand as necessary OR Worcestershire sauce
• 1½ pounds skirt or flank steak halved crosswise
• 4 medium bell peppers seeded and thinly sliced I used red, yellow, orange and green
• 1 medium red onion thinly sliced
• 1-2 tablespoons unsalted butter

For serving:

• lime wedges
• sliced avocado
• low carb tortillas or cauliflower rice for serving

FOR MEAL PREP:

• lunch containers

Instructions

1. Combine all the ingredients for the fajita seasonings. Reserve 1 1/2 teaspoons for the bell peppers.
2. In a medium bowl, combine 2 tablespoons of olive oil, chopped cilantro, lime juice, mustard and 5 teaspoons of the fajita seasonings. Reserve 1 tablespoon of the steak marinade for drizzling on the steak at the end. Pour remainder of the steak marinade into a large zip-top bag along with the steak. Press the bag to evenly distribute the marinade and allow to sit while you prepare the vegetables.
3. Slice the the onions and bell peppers.
4. Heat 1 tablespoon olive oil in a 12" skillet over medium high heat. Add the onions and allow to cook for about 5 minutes, or until softened and fragrant. Add the bell peppers and sprinkle with the reserved 1 1/2 teaspoons of fajita seasonings. If you like the peppers with a nice crunch - cook for about 3-5 minutes. And if you like them softer, leave them on for about 3 minutes longer. Transfer and set aside on a plate.
5. Melt butter on the same skillet and sear the steak. Allow to sear for 3 to 4 minutes (or more depending on how done you like your steak) on each side. Transfer steak to a cutting board and allow to rest for at least 5 minutes before slicing into thin strips. Add the reserved steak marinade to the skillet and add the steak strips until just heated. Remove from heat.
6. Serve hot with warm tortillas, avocado slices and lime wedges.

For a low carb version, you can use these low carb tortillas , serve over some lettuce or cauliflower rice.

For Meal Prep:

1. Divide evenly into lunch containers.