When I think of summer evenings filled with laughter and the smell of something delicious on the grill, I can’t help but reminisce about our family cookouts. My dad would fire up the grill and marinate flank steak, filling the air with the sweet and savory aroma that would have us all gathering around long before it was ready. That’s when I first tried this Keto Grilled Flank Steak recipe, and let me tell you, it’s been a staple ever since. It’s juicy, flavorful, and just perfect for those warm nights when you want to keep things light and fresh.
This Keto Grilled Flank Steak is not just a recipe; it’s a celebration of flavors that makes any gathering feel special. Whether you’re hosting a backyard barbecue or simply enjoying a weeknight dinner with your family, this dish is quick to prepare and absolutely satisfying. With only a handful of ingredients, you’ll find that it fits seamlessly into your low-carb lifestyle while still delivering that vibrant taste that everyone loves. Grab your grill and let’s dive into making this scrumptious steak!
Why You’ll Love "Keto Grilled Flank Steak"
- Quick prep and cook time, ready in just 25 minutes!
- Minimal ingredients mean you won’t need to raid the pantry.
- Perfectly juicy and flavorful, it’s a hit with the whole family.
- Low-carb and keto-friendly, fitting right into your healthy lifestyle.
- Grilling brings out the best flavors, making every bite delicious.
- Leftovers are perfect for meal prep or quick lunches!
Ingredients You’ll Need
For the Marinade
- 3 Tbsp. apple cider vinegar (try to use organic for a cleaner taste)
- 1 teaspoon sea salt (I love using kosher salt for a bit more texture)
- 1 teaspoon black pepper (freshly cracked is always best)
- 1 teaspoon cumin (adds a lovely warmth)
- 1 teaspoon turmeric (gives a beautiful color and health benefits)
- 1 clove garlic, mashed (you can use garlic powder if you’re in a pinch)
For the Steak
- 1-1.5 lb. flank steak (look for one that’s nicely marbled for extra flavor)
Step-by-Step Instructions
Preheat the Grill
- Start by preheating your grill to medium-high heat. This usually takes about 10-15 minutes, so be patient!
- Make sure the grill grates are clean and lightly oiled to prevent sticking. A quick rub with a paper towel soaked in oil does the trick.
Make the Marinade
- In a mixing bowl, combine 3 tablespoons of apple cider vinegar, 1 teaspoon of sea salt, 1 teaspoon of black pepper, 1 teaspoon of cumin, 1 teaspoon of turmeric, and 1 mashed clove of garlic.
- Whisk everything together until it's well blended. You want that garlic to really infuse the marinade!
Marinate the Steak
- Take your flank steak and place it in the bowl with the marinade. Make sure to coat it evenly on all sides.
- Let the steak sit in the marinade for at least 15 minutes. If you have the time, letting it marinate longer will deepen those flavors even more!
Grill the Steak
- Once your grill is ready and the steak has marinated, it’s time to grill! Place the flank steak on the grill.
- Grill for about 5 minutes on one side. You want those beautiful grill marks!
- Flip the steak and grill for another 5 minutes for medium-rare. Adjust the time if you prefer it more or less done.
Serve the Steak
- Remove the steak from the grill and let it rest for about 5 minutes. This helps keep it juicy!
- Slice the steak against the grain for the most tender bites.
- Serve it up with your favorite low-carb sides or on a fresh salad, and enjoy every delicious bite!
Variations
- Add a splash of lime juice to the marinade for a zesty kick.
- Try using flank steak with a different spice blend, like smoked paprika and garlic powder.
- For a seasonal twist, incorporate fresh herbs like cilantro or basil into the marinade.
- Grill the steak on a cedar plank for an aromatic flavor.
- Make it dairy-free by ensuring all ingredients are free of dairy additives.
Serving and Storage Tips
Serving
Serve the Keto Grilled Flank Steak warm, sliced against the grain for maximum tenderness. Pair it with a fresh green salad or roasted vegetables for a complete meal. A dollop of homemade avocado salsa or chimichurri adds a delightful twist!
Storage
Store any leftovers in an airtight container in the fridge for up to 3 days. For longer storage, freeze the sliced steak for up to 3 months. Reheat gently on the grill or in a skillet to retain juiciness.
Helpful Notes
- If you don’t have flank steak, sirloin or skirt steak can work just as well.
- For a spicier marinade, add a pinch of cayenne pepper or some chopped jalapeños.
- Consider adding a teaspoon of honey or a sugar substitute to balance the acidity in the marinade.
- This recipe is gluten-free, just double-check your spice labels for any hidden gluten.
- Leftover steak makes a fantastic topping for low-carb tacos or salads!
Frequently Asked Questions
Can I freeze Keto Grilled Flank Steak?
Yes, you can freeze Keto Grilled Flank Steak! Just slice it and store it in an airtight container or freezer bag. It will keep well for up to 3 months. When you're ready to eat, thaw it in the fridge overnight and reheat gently.What can I substitute for apple cider vinegar?
If you don’t have apple cider vinegar, you can use red wine vinegar or white wine vinegar as a substitute. Both will give you a tangy flavor that complements the marinade nicely! For more information on vinegar types, you can check out Food Network's guide to vinegars.How do I know when the flank steak is done?
For the perfect doneness, use a meat thermometer. Aim for about 130°F for medium-rare and 140°F for medium. If you don't have a thermometer, cut into the steak to check the color; it should be slightly pink in the center for medium-rare. You can find more details on steak temperatures from the USDA's safe temperature chart.Can I use other cuts of meat?
Absolutely! While flank steak is great for this recipe, you can substitute with skirt steak, sirloin, or even chicken breast for a different take. Just adjust the cooking time as necessary, especially for chicken. For more information on different cuts of beef, consult resources like the Certified Angus Beef cut guide.Final Thoughts
Cooking this Keto Grilled Flank Steak is not just about the meal; it’s about bringing people together and creating memories. I know you’ll love how simple yet delicious this recipe is, and I can’t wait for you to experience those juicy bites dripping with flavor. So fire up that grill, gather your loved ones, and let the magic happen. You’ve got this, and I promise, it’ll be a recipe you return to again and again. Happy cooking!

Keto Grilled Flank Steak
Ingredients
Equipment
Method
- In a mixing bowl, combine apple cider vinegar, sea salt, black pepper, cumin, turmeric, and mashed garlic to create the marinade.
- Place the flank steak in the marinade and let it sit for at least 15 minutes before grilling.
- Preheat your grill to medium-high heat. Grill the flank steak for about 5 minutes on each side or until desired doneness.
- Remove from the grill, let it rest for a few minutes, then slice against the grain and serve.





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