This Keto Beef & Broccoli Stir Fry is a quick, flavorful dinner that proves low-carb meals don’t have to be boring. Tender strips of beef are cooked with crisp-tender broccoli and coated in a rich, savory garlic sauce.
Ready in about 25 minutes, this one-pan meal is perfect for busy weeknights when you want something satisfying without rice, noodles, or a heavy carb-filled sauce.
Ingredients
For the Beef
- 1½ lbs (680 g) beef sirloin, flank steak, or ribeye, thinly sliced
- 1 tablespoon avocado oil or olive oil
- ½ teaspoon salt
- ½ teaspoon black pepper
For the Broccoli
- 4 cups broccoli florets
- 2 tablespoons water
For the Keto Stir-Fry Sauce
- ¼ cup coconut aminos or low-sodium soy sauce
- 1 tablespoon sesame oil
- 1 tablespoon rice vinegar
- 1 tablespoon keto-friendly sweetener, such as erythritol or allulose
- 3 cloves garlic, minced
- 1 teaspoon fresh ginger, grated
- ½ teaspoon red pepper flakes, optional
- ½ teaspoon xanthan gum, optional, for thickening
For Garnishing
- 1 teaspoon sesame seeds
- 2 green onions, thinly sliced
- Extra red pepper flakes, optional
How to Make Keto Beef & Broccoli Stir Fry
1. Slice the Beef
For tender stir-fry beef, slice the steak thinly against the grain.
If the meat is difficult to slice, place it in the freezer for about 15–20 minutes first. This firms it up and makes thin slicing much easier.
Season the beef lightly with salt and black pepper.
2. Prepare the Sauce
In a small bowl, whisk together the coconut aminos or soy sauce, sesame oil, rice vinegar, keto sweetener, garlic, ginger, and red pepper flakes.
If you want a thicker sauce, whisk the xanthan gum into the mixture very gradually to prevent clumping.
Set aside.
3. Cook the Beef
Heat a large skillet or wok over medium-high to high heat.
Add the oil.
Once hot, add the beef in a single layer. Work in batches if necessary so you don’t overcrowd the pan.
Cook for approximately 2–3 minutes per side, depending on how thinly the beef is sliced.
Transfer the cooked beef to a plate.
4. Cook the Broccoli
Add the broccoli to the same skillet.
Pour in 2 tablespoons of water and cover for about 2 minutes. This helps the broccoli steam while remaining crisp-tender.
Remove the lid and continue cooking for another 1–2 minutes.
5. Bring Everything Together
Return the beef to the skillet.
Pour the prepared sauce over the beef and broccoli.
Toss everything together and cook for another 1–2 minutes, allowing the sauce to coat the ingredients.
Don’t cook the sauce for too long or the beef can become tough.
6. Garnish and Serve
Remove from the heat and sprinkle with sesame seeds and sliced green onions.
Serve immediately.
For a keto-friendly meal, enjoy it on its own or spoon it over cauliflower rice.
Tips for Tender Beef
Slice against the grain: This is one of the most important steps for tender stir-fry.
Don’t overcrowd the pan: Too much beef at once causes it to steam instead of sear.
Use high heat: Stir-frying works best when the pan is hot.
Cook quickly: Thin slices of beef need only a few minutes.
Don’t overcook: Remove the beef as soon as it’s cooked to your preferred level.
How to Keep It Keto
The ingredients in this recipe are selected to keep carbohydrates relatively low, but the exact nutrition depends on the brands and quantities used.
For a lower-carb version:
- Choose unsweetened soy sauce or coconut aminos carefully.
- Use a keto-friendly sweetener rather than regular sugar.
- Avoid serving it with rice or regular noodles.
- Check sauces and condiments for added sugar.
- Use plain broccoli rather than sweetened or packaged sauces.
Easy Variations
Spicy Keto Beef & Broccoli
Add extra red pepper flakes or a small amount of keto-friendly hot sauce.
Garlic Butter Beef & Broccoli
After cooking, stir in 1 tablespoon of butter along with an additional minced garlic clove.
Sesame Beef & Broccoli
Add an extra teaspoon of sesame oil and sprinkle generously with toasted sesame seeds before serving.
Chicken & Broccoli Stir Fry
Replace the beef with thinly sliced chicken breast or boneless chicken thighs. Cook chicken thoroughly before adding the sauce.
What to Serve With It
Keep the meal low-carb by serving the stir fry with:
- Cauliflower rice
- Shirataki noodles
- Sautéed cabbage
- Zucchini noodles
- Steamed cauliflower
- A simple cucumber salad
If you’re not following a keto diet, regular steamed rice or noodles can also be served alongside it.
Storage and Reheating
Store leftovers in an airtight container in the refrigerator for up to 3–4 days.
Reheat gently in a skillet over medium heat or in the microwave until heated through.
Avoid repeatedly reheating the beef, as this can make it chewy.
Frequently Asked Questions
Is beef and broccoli keto-friendly?
It can be. Beef and broccoli are naturally low in carbohydrates, but many traditional stir-fry sauces contain sugar. Using a low-carb sauce and sweetener helps keep the meal suitable for a keto eating pattern.
Can I use frozen broccoli?
Yes. Frozen broccoli works, although it may release more water than fresh broccoli. Cook it until heated through and allow excess moisture to evaporate before adding the sauce.
What cut of beef is best?
Flank steak, sirloin, and ribeye all work well. The most important factor is slicing the beef thinly against the grain.
Can I make this ahead?
Yes. Prepare the stir fry and refrigerate it in an airtight container. Reheat gently when you’re ready to eat.
Final Thoughts
This Keto Beef & Broccoli Stir Fry is a simple way to enjoy classic takeout-style flavors while keeping the meal relatively low in carbohydrates. Tender beef, fresh broccoli, garlic, ginger, sesame oil, and a savory sauce come together quickly in one skillet.
It’s flavorful enough to satisfy a takeout craving and easy enough to become part of your regular weeknight dinner rotation.
SEO Details
SEO Title: Keto Beef & Broccoli Stir Fry – Easy Low-Carb Dinner
Meta Description: Make this easy Keto Beef & Broccoli Stir Fry with tender beef, crisp broccoli, garlic, ginger, and a savory low-carb sauce in about 25 minutes.
Focus Keyword: Keto Beef & Broccoli Stir Fry
Slug: keto-beef-broccoli-stir-fry
Category: Keto Recipes
Tags: Keto Beef, Beef and Broccoli, Keto Dinner, Low Carb Recipes, Stir Fry Recipes, Easy Keto Meals, Beef Recipes