This easy Keto Low Carb Beef and Broccoli is the perfect solution for busy weeknights when you crave takeout flavors without the added sugar. By using high-quality flat iron steak and fresh aromatics, you create a restaurant-style stir-fry right in your own kitchen. This dish is naturally gluten-free and fits perfectly into a ketogenic lifestyle, offering a delicious balance of savory umami and crisp vegetables. Whether you are meal prepping for the week or looking for a fast family dinner, this recipe is sure to become a staple in your home.
1 hour
12 minutes
1 hour 12 minutes
4
Why You’ll Love This Recipe
- It features a keto-friendly, sugar-free savory sauce.
- The flat iron steak is budget-friendly and tender.
- It is a quick, one-pan meal perfect for busy schedules.
- It avoids common restaurant heavy starches and additives.
- You can prepare the marinade in advance for faster dinner prep.
- It fits perfectly into low-carb or paleo meal plans.

Ingredients
To make the best Keto Low Carb Beef and Broccoli, focus on fresh, high-quality ingredients. You will need a good cut of beef, fresh broccoli, and basic pantry staples to create the nutrient-dense marinade.
- 1 lb Flat Iron steak, thinly sliced against the grain
- 1/2 lb Broccoli, cut into small florets
- 1/4 cup Coconut Oil
- 1 tsp Toasted Sesame Oil
- 1 tsp Fish Sauce
- Beef and Broccoli Marinade:
- 1/4 cup Coconut Aminos
- 1 tsp Root ginger, peeled and grated
- 2 cloves Garlic, chopped
Ingredient Notes and Substitutions
These simple adjustments help you customize your Keto Low Carb Beef and Broccoli based on what you have in your pantry.
- Use tamari as a substitute for coconut aminos if you prefer a saltier flavor.
- Avoid powdered ginger; fresh root ginger provides the best zing and depth.
- If you cannot find flat iron steak, sirloin or flank steak works well.
- Add sliced bell peppers or snap peas for extra color and nutrition.
- Ensure you blanch the broccoli to maintain its bright green color and crisp texture.

How to Make Keto Low Carb Beef and Broccoli
Scroll up to watch the recipe video!
Step 1: Prep and Marinate
Cut the flat iron steak into very thin slices against the grain to ensure tenderness. Place the beef into a small sealable bag with the coconut aminos, minced garlic, and freshly grated ginger. Let it marinate in the refrigerator for at least one hour.
Step 2: Prepare the Broccoli
Bring a pot of water to a boil and blanch the broccoli florets for exactly two minutes. Drain them thoroughly and set aside. This ensures the broccoli is perfectly cooked once stir-fried.
Step 3: Sear the Beef
Drain the beef from the marinade, but be sure to reserve the liquid for the stir-fry sauce. Heat half the coconut oil in a large wok or cast iron skillet over medium-high heat. Add the beef and stir-fry until browned, usually between one and three minutes.
Step 4: Combine and Finish
Remove the beef from the skillet and add the remaining oil. Stir-fry the broccoli for about three minutes until crisp-tender. Pour in the reserved marinade and cook for two more minutes, then return the beef to the pan. Add the fish sauce and toasted sesame oil, stir to coat, and serve immediately.
Pro Tips
- Always slice your steak against the grain to guarantee maximum tenderness in every bite.
- Do not overcook the broccoli; it should maintain a vibrant green color and slight crunch.
- Prepare the marinated beef earlier in the day to save time during your evening rush.
- Use a very hot cast iron skillet to achieve a nice sear on the meat without steaming it.

Serving Suggestions
Serve this dish hot as a standalone meal or pair it with low-carb options for a complete dinner experience.
- Serve over a bed of cauliflower rice to soak up the leftover savory stir-fry sauce.
- Pair with a side of sesame-crusted zucchini noodles or shirataki noodles.
- Add a side of refreshing cucumber salad to balance the heat.
- Top with toasted sesame seeds and fresh scallions for an extra pop of flavor.
Storage and Reheating
Store leftovers in an airtight container in the refrigerator for up to three days. To reheat, warm in a pan over medium heat with a splash of water to prevent the meat from drying out. Do not freeze, as the broccoli texture will become mushy upon thawing.
FAQs
Can I use frozen broccoli?
You can, but fresh is best. If using frozen, skip the blanching step and stir-fry until the ice has evaporated and the florets are heated through.
Why is my beef chewy?
Ensure you are slicing against the grain and not overcooking the meat. Flat iron steak is naturally tender, but quick high-heat cooking is essential.
Is this recipe suitable for meal prep?
Yes, keep the cooked beef and broccoli in a container and reheat gently when you are ready to eat.
How many net carbs are in this dish?
This Keto Low Carb Beef and Broccoli contains approximately 6g of net carbs per serving.
More Recipes You’ll Love
If you enjoyed this quick stir-fry, check out our other favorite low-carb dinner ideas that are perfect for busy weeknights.
- Healthy Garlic Butter Shrimp
- Crispy Keto Chicken Thighs
- Easy Oven Baked Salmon
- Zucchini Noodles with Pesto
- Low Carb Egg Roll in a Bowl
Final Thoughts
This Keto Low Carb Beef and Broccoli is proof that you do not need to sacrifice flavor to stick to your dietary goals. With a perfect balance of savory, fresh textures and simple ingredients, it truly feels like a treat. Whether you are cooking for one or feeding the whole family, this meal is fast, nourishing, and incredibly satisfying. We highly recommend giving this recipe a try tonight to see just how easy homemade keto stir-fry can be. If you enjoyed this meal, share your results with friends and let us know your favorite variation in the comments below!
PrintKeto Low Carb Beef and Broccoli
This easy Keto Low Carb Beef and Broccoli is the perfect solution for busy weeknights when you crave takeout flavors without the added sugar. By using high-quality flat iron steak and fresh aromatics, you create a restaurant-style stir-fry right in your own kitchen. This dish is naturally gluten-free and fits perfectly into a ketogenic lifestyle, offering a delicious balance of savory umami and crisp vegetables. Whether you are meal prepping for the week or looking for a fast family dinner, this recipe is sure to become a staple in your home.
- Prep Time: 1 hour
- Cook Time: 12 minutes
- Total Time: 1 hour 12 minutes
- Yield: 4 servings 1x
- Category: Keto Dinner
- Method: Stir-fry
- Cuisine: Asian-Inspired
- Diet: Keto, Gluten-Free
Ingredients
1 lb Flat Iron steak, thinly sliced against the grain
1/2 lb Broccoli, cut into small florets
1/4 cup Coconut Oil
1 tsp Toasted Sesame Oil
1 tsp Fish Sauce
1/4 cup Coconut Aminos (for marinade)
1 tsp Fresh root ginger, peeled and grated (for marinade)
2 cloves Garlic, chopped (for marinade)
Instructions
In a bowl, combine the coconut aminos, grated ginger, and chopped garlic to make the marinade.
Place the thinly sliced beef into the marinade and let sit for 1 hour.
Heat the coconut oil in a large skillet or wok over medium-high heat.
Add the marinated beef to the skillet and sear until cooked through, then remove the beef from the pan.
Add the broccoli florets to the same pan and stir-fry until tender-crisp.
Return the beef to the pan and toss with the sesame oil and fish sauce.
Serve immediately while hot.
Notes
Use tamari as a substitute for coconut aminos if you prefer a saltier flavor. Always use fresh ginger instead of powdered for the best depth of flavor. If you cannot find flat iron steak, sirloin or flank steak are excellent alternatives.
Nutrition
- Serving Size: 1 portion
- Calories: 320
- Sugar: 2g
- Sodium: 450mg
- Fat: 22g
- Saturated Fat: 12g
- Carbohydrates: 6g
- Fiber: 2g
- Protein: 28g
- Cholesterol: 85mg

