Easy, Keto Low-Carb Paleo Steak Fajitas with Marinade is a quick healthy recipe that uses flank, sirloin, or skirt steak to grill juicy carne asada beef fajitas. This recipe includes instructions to prepare homemade seasoning and a marinade that will make your mouth water. Serve the steak and veggies on lettuce wraps or as a bowl.
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This post was originally posted in 2017. It has since been updated.
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.
It’s not a secret among my friends and family that my steak marinade is the absolute truth. I love to whip up juicy, mouth-watering steaks. My preferred method is grilled. I find it easier to obtain medium doneness that way.
The grill also offers so much flavor. I grill pretty much any time of the year. I’m not afraid to put on my coat and snow boots during the winter for the sake of a great meal. If you don’t have a grill, stove top or the oven will work just fine.
How to Make Fajitas on Keto Diet
Nice low-carb fajitas are very easy to make. You will need fresh chopped onions and peppers along with steak, preferably skirt or sirloin. Then you will make homemade fajita seasoning using chili powder, unsweetened cocoa powder, cumin, steak seasoning, garlic powder, salt, and pepper. All of these ingredients are naturally low in carbs and perfect for the keto diet and lifestyle.
How to Make Steak Fajitas Marinade
I use low-sodium soy sauce as the liquid base for the marinade. Combine it with the steak and chili powder, unsweetened cocoa powder, cumin, steak seasoning, garlic powder, salt, and pepper. Marinate the meat in the fridge, preferably overnight for at least 2 hours.
How to Make Good Steak Lettuce Wraps
- I prefer to grill the marinated steak, carne asada style. Once the steak has finished marinating, place a grill on medium-high heat. Allow the grill to heat for 4-5 minutes.
- Add the steak and grill until preferred doneness. Use a meat thermometer and test the interior of the meat to determine when it has finished cooking. The USDA minimum is 145 degrees. Here is a listing of the barometer: rare: 120-130 degrees, medium rare: 130-135 degrees, medium, 135-145 degrees, medium well 145-155 degrees, and well done 155 degrees.
- Season the veggies with garlic powder and place the vegetables in a grill basket and grill for 7-10 minutes until the veggies are soft and slightly charred.
- Remove the steak and veggies from the grill. Allow the meat to rest for 10-15 minutes prior to serving.
- Serve the fajitas over crunchy lettuce wraps. Romaine and butter lettuce work the best.
You can read more about the science and temperatures of cooking here.
How Many Carbs are in Keto Steak Fajitas?
These steak fajitas have 4 net carbs.
Do I Have to Grill the Steak?
No, you can also pan sear the steak using the same temperature direction noted above.
You may love our Steak Stir Fry recipe.
Easy, Keto Low-Carb Steak Fajitas with Marinade
Want to save this recipe for later?
I'll email it to you, so you can come back to it later! You will also get our free digital cookbook with 30-Minute One-Pot Recipes and weekly recipes and tips.
Ingredients
- 1 pound sirloin steak tips, skirt, or flank steak
- ½ cup sliced red onion
- ¼ medium green pepper sliced into thin pieces
- ¼ medium red pepper sliced into thin pieces
- ¼ medium orange pepper sliced into thin pieces
- ¼ medium yellow pepper sliced into thin pieces
- 1 tablespoon grassfed butter
- Romaine lettuce slices for wraps
Steak Marinade
- 1 ½ tablespoons of low sodium soy sauce or liquid aminos
- 1 teaspoon dry, unsweetened Cocoa powder
- 2 teaspoons McCormick’s Grill Mates Montreal Steak Seasoning
- 2 teaspoons McCormick’s Grill Mates BBQ Seasoning
- 1 teaspoon chili powder
- 1 teaspoon cumin
- 1 teaspoon garlic powder
- salt and pepper to taste
Instructions
- I like to use sirloin tips because they are sliced perfectly for fajitas. You can use whole steaks if you wish and you can slice it before or after cooking.
- Drizzle the soy sauce over the steak.
- Combine the seasonings in a bowl.
- Sprinkle the seasonings on both sides of the steak. Place the steak in a Ziploc bag. Seal the bag, removing all air. Pat the outside of the bag to ensure added soy sauce saturates the meat.
- Place in fridge to marinate for at least 2 hours, preferably overnight.
- Once the steak has finished marinating, place a grill on medium-high heat. Allow the grill to heat for 4-5 minutes.
- Add the steak and grill until preferred doneness. Use a meat thermometer and test the interior of the meat to determine when it has finished cooking. The USDA minimum is 145 degrees. Here is a listing of the barometer: rare: 120-130 degrees, medium rare: 130-135 degrees, medium, 135-145 degrees, medium well 145-155 degrees, and well done 155 degrees.
- Season the veggies with garlic powder and place the vegetables in a grill basket and grill for 7-10 minutes until the veggies are soft and slightly charred.
- Melt 1 tablespoon of grass-fed butter in the microwave for 30 seconds and stir. After the steak has reached the desired doneness, using a cooking brush, brush the butter onto both sides of the steak while it’s on the grill.
- Remove the steak from the grill and allow it to cool for 10-15 minutes before serving.
- Spoon the mixture into the center of a lettuce leaf. Serve!
Nutrition
Nutrition Data
Macros are provided as a courtesy and should not be construed as a guarantee. This information is calculated using MyFitnessPal.com. To obtain the most accurate nutritional information in a given recipe, you should calculate the nutritional information with the actual ingredients used in your recipe, using your preferred nutrition calculator. You are solely responsible for ensuring that any nutritional information provided is accurate, complete, and useful.
Sarah @ Champagne Tastes says
I always forget about making lettuce wraps! What a tasty way to eat fillings.. I need to do this now!
Michelle @ Vitamin Sunshine says
So healthy and colorful! Looks like a perfect low carb meal option. You should consider changing the color of text in your comment box-- it looks like I am not typing anything, and I have to strain to see what I am writing.
Laura | Wandercooks says
High five to the sriracha - that stuff is amazing! Also high five to these wraps - I love using lettuce instead of bread wraps because it doesn't overpower the flavours going on inside the wrap itself, and also doesn't make you feel bloated. Never tried steak in a wrap though - looks like I need to make up for that asap! 😀
Hannah Healy says
This looks so delicious and healthy.
Debra C. says
Excellent choice for a low carb meal. Your dry marinade looks amazing too, loving the cocoa - so much flavor, YUM!
Karly says
Ways to survive a low carb life- ALLLL the meats. These look SO good. Like, kinda have the meat sweats just from the photos, good. Ned to make these soon!
staysnatched says
Ha yes! I definitely probably overdue it on meat when it comes to low carb. So yummy!
Cliona Keane says
Yummy! These look delicious, I do love a low carb recipe, especially for mid-week lunches!
Luci's Morsels says
This looks delicious and nutritious! Yum! I love the idea of using steak instead of basic, ground beef.
Cricket Plunkett says
Nothing better than a healthy recipe loaded with steak! This is my kind of dinner!
Lindsay Cotter says
I could eat these steak wraps every day too! They look so delicious! And that drizzle of Sriarcha is the perfect finish!
Hannah Healy says
Wow the colors on these photos are so vibrant.
Megan Pohlman says
This looks amazing but I don’t think it’s paleo considering it has soy sauce. Though it can be paleo by using coconut aminos instead!
staysnatched says
Great point. Thanks for catching. I will add the substitute.
Simi says
Could you recommend some sort of seasoning for ground turkey? I’d like to make these today, but only have ground turkey.
staysnatched says
Hi there. McCormick's Grill Mates also makes a Montreal Chicken Seasoning that works well for ground turkey.
p3orion says
TLDR version: Make fajitas. Use lettuce instead of tortillas.
Sara Porter says
Hey there! Ibfound thisbrecipe a couple years ago and absolutely loved it. I was soooo happy to find it again today, but I noticed the vegetables are cooked differently. Do you happen to have have the old recipe? I remember that the vegetables were cooked with fresh garlic and siracha on the stove, but that's it.
staysnatched says
I don't, but that's how I remember it. The way you described it.
Sydney says
This marinade is everything! First time making steak fajitas and I will definitely be going back to this recipe for the future. So tasty.
Sydney says
My go to fajita recipe and marinade! The best!
Sydney says
Marinated mine overnight like suggested and it was so good! Will definitely make these again
staysnatched says
Awesome!