Beef and broccoli is the most-ordered Chinese takeout dish in America, and it’s also one of the easiest to make at home.
Tender strips of beef, tender-crisp broccoli, and a savory garlic-ginger sauce that coats everything.
The takeout version is loaded with sugar and sodium. This one isn’t.
This version is built for the crockpot. Thin-sliced flank steak cooks low and slow until tender, then finishes with a low-sugar garlic-ginger tamari sauce, with broccoli added in the last 20–25 minutes to keep it bright green and tender-crisp.
Served over brown rice or cauliflower rice, it’s a complete meal.
About 50–55 grams of protein per serving when you divide 2 pounds of beef into 4 portions.
That’s real takeout-fakeout territory — the kind of number that makes this a genuine meal prep staple for anyone tracking macros.
One honest thing worth knowing: the beef is thin-sliced, so it has a shorter cooking window than a chuck roast.
Thin-sliced flank steak is tender at 2½–3½ hours on LOW and chewy past that. Start checking at 2½ hours and pull it when it’s tender.
And a second honest note: “crisp broccoli” isn’t realistic from a slow cooker. A crockpot steams broccoli in a humid environment, so the best you can aim for is tender-crisp — bright green with a little bite. That’s what the timing below delivers.
Why This Crockpot Beef and Broccoli Works
Thin-sliced flank steak cooks quickly in the slow cooker. A 2½–3½ hour cook on LOW is enough to make thin strips tender without drying them out. Cook longer than that, and the beef turns chewy.
Sirloin works too. If you want a slightly more forgiving cut, slice sirloin thinly; it stays tender through a slightly wider window. Both are excellent.
The sauce is savory and tangy, not sugary. It’s made with tamari, beef broth, rice vinegar, garlic, ginger, and a modest amount of honey. It tastes like real beef and broccoli, not candy-coated beef.
⅓ cup of tamari instead of ½ cup keeps the salt in check. Tamari plus beef broth plus a long cook can make a sauce that’s too salty. Starting with less and adding more at the end is easier than fixing an oversalted sauce.
Cornstarch at the end makes the sauce glossy and sticky. The braising liquid is thin on its own. A slurry during the last 5–10 minutes turns it into a sauce that clings to every piece of beef and broccoli.
The broccoli goes in last. Twenty to twenty-five minutes on HIGH steams the broccoli through without turning it gray. Any longer and it loses its color and texture.
It’s a genuine takeout fakeout. Same flavors, same textures, same sticky-savory satisfaction — without the sugar bomb or the $18 delivery fee.
It’s high in protein. About 50–55g per serving from the beef alone, depending on the cut and trimming.
It’s meal-prep friendly. Portion it over rice into containers and refrigerate for 4 days or freeze for 3 months.
It’s Whole30-friendly with one swap. Use coconut aminos instead of tamari, skip the honey, and use arrowroot instead of cornstarch. Serve over cauliflower rice.
Crockpot Beef and Broccoli
Thin-sliced flank steak slow-cooked in a savory garlic-ginger tamari sauce with tender-crisp broccoli. Serve over brown rice, jasmine rice, or cauliflower rice for an easy high-protein takeout fakeout.
Ingredients
For the beef:
- 2 lbs flank steak or sirloin, thinly sliced against the grain
- 1 tbsp neutral oil (avocado or canola)
- ½ tsp kosher salt
- ¼ tsp black pepper
For the sauce:
- ⅓ cup low-sodium tamari or low-sodium soy sauce
- ¼ cup low-sodium beef broth
- 2 tbsp rice vinegar
- 2 tbsp honey
- 4 cloves garlic, minced
- 1 tbsp freshly grated ginger
- 1 tsp toasted sesame oil
- ¼ tsp red pepper flakes (optional)
For the finish:
- 1½ tbsp cornstarch
- 2 tbsp cold water
- 6 cups broccoli florets (about 2 medium heads)
- 2 green onions, thinly sliced
- 1 tbsp sesame seeds, for garnish
For serving:
- Cooked brown rice, jasmine rice, or cauliflower rice
Instructions
Instructions
1. Prep the beef. Pat the flank steak dry with paper towels. Slice it into thin strips, about ¼ inch thick, cutting against the grain. Season lightly with salt and black pepper.
2. Make the sauce. In a medium bowl, whisk together the tamari, beef broth, rice vinegar, honey, garlic, ginger, sesame oil, and red pepper flakes (if using).
3. Load the slow cooker. Lightly coat the inside of a 6-quart slow cooker with the neutral oil. Add the sliced beef and pour the sauce over. Stir gently to coat the beef in the sauce.
4. Cook the beef. Cover and cook on LOW for 2½–3½ hours, checking the beef around the 2½-hour mark. The beef should be cooked through and tender. Avoid cooking it significantly longer than necessary, since thin-sliced flank steak can become dry or chewy when overcooked.
5. Add the broccoli. During the final 20–25 minutes of cooking, add the broccoli florets. Stir gently to coat them with some of the sauce, cover, and cook on HIGH until the broccoli is bright green and just tender but still has some bite. Check at 20 minutes — slow cookers vary.
6. Thicken the sauce. Whisk the cornstarch and cold water together until smooth. Transfer the beef and broccoli to a serving bowl or leave them in the slow cooker. Stir in the cornstarch slurry. Cover and cook on HIGH for about 5–10 minutes, stirring once or twice, until the sauce is glossy and thickened. If the sauce needs more thickening, mix 1 teaspoon of cornstarch with 1 tablespoon of cold water and add it gradually.
7. Taste and serve. Taste the sauce before serving. Add a splash of rice vinegar for more brightness, a small drizzle of honey if you prefer it sweeter, or a little more tamari if it needs more salt. Serve over brown rice, jasmine rice, or cauliflower rice. Finish with sliced green onions and sesame seeds.
Notes
Protein per Serving: About 50–55g
Nutrition note: Protein varies by beef cut and portion size. This estimate assumes 2 lbs of flank steak divided into 4 servings and does not include rice. Calculate with your specific ingredients for accurate numbers.
Tips for the Best Crockpot Beef and Broccoli
Slice the beef against the grain. This is the single most important step for tender beef. Look for the lines running through the meat and slice perpendicular to them. Slicing with the grain makes beef chewy and stringy, no matter how long you cook it.
Watch the beef’s cook time. Thin-sliced flank steak is tender at 2½–3½ hours on LOW. Beyond that, it dries out and turns chewy. Start checking at 2½ hours and pull it when it’s tender.
Sirloin is a slightly more forgiving cut. Flank steak has a stronger beefy flavor, but sirloin stays tender through a slightly wider window. Either works — sirloin is the better choice if you’re worried about overcooking.
Use ⅓ cup of tamari, not ½ cup. Tamari plus beef broth plus a long cook can make the sauce too salty. Start with less and add more at the end if needed. You can always add salt, but you can’t take it out.
Add the broccoli in the last 20–25 minutes. Broccoli cooked longer than that turns gray and mushy. Twenty minutes on HIGH is the sweet spot for bright green, tender-crisp broccoli.
Check the broccoli at 20 minutes. Slow cookers vary, and broccoli goes from tender-crisp to soft quickly. Pull a piece out and bite it — it should have a little bite to it.
Don’t skip the cornstarch slurry. The braising liquid is thin on its own. A slurry during the last 5–10 minutes turns it into a glossy, sticky sauce that clings to the beef and broccoli.
Stir the slurry in slowly. Pour it in a steady stream while stirring. Dumping it in all at once can cause clumps.
Taste before adding more tamari. Tamari, beef broth, and the sauce reduction all contribute sodium. Taste first, then season.
Add a splash of rice vinegar at the end if it tastes flat. Acid brightens the sauce and keeps it from tasting heavy.
Serve over brown rice for the highest protein. Brown rice adds about 5g of protein per cup. Cauliflower rice keeps it lower-carb.
For meal prep, portion over rice and refrigerate. The beef and broccoli hold up for 4 days. Add a splash of water or broth when reheating.
Easy Variations
Whole30 Crockpot Beef and Broccoli
Swap the tamari for coconut aminos, skip the honey, and use arrowroot starch instead of cornstarch. Serve over cauliflower rice. It’s a fully Whole30-compliant version of the same dish.
Teriyaki Beef and Broccoli
Replace the tamari with ⅓ cup of teriyaki sauce and 2 tbsp of tamari. Increase the honey to 3 tablespoons. Add 1 tsp of rice vinegar. It’s a sweeter, glossier version that’s closer to the takeout classic.
Beef and Broccoli Noodles
Skip the rice and serve the beef and broccoli over lo mein noodles or wide rice noodles. Toss the noodles with a little of the sauce before plating. It’s a heartier version that eats like a full takeout meal.
Broccoli and Ground Beef (Budget Version)
Swap the flank steak for 1½ lbs of lean ground beef.
Brown it in a skillet first, then add it to the slow cooker with the sauce and cook on LOW for 2–3 hours.
Add the broccoli in the last 20 minutes. It’s cheaper, faster, and still high in protein. About 34–36g per serving.
Storage and Food Safety
Refrigerator: Store the beef, broccoli, and sauce in an airtight container for up to 4 days. Store rice separately for the best texture.
Freezer: Freeze the cooked beef and sauce without the broccoli for up to 3 months. Cook fresh broccoli when you reheat. Thaw overnight in the refrigerator and reheat gently on the stovetop or in the microwave.
Reheating: Reheat in the microwave in 60–90 second intervals with a splash of water or broth, or on the stovetop over medium-low heat. Add fresh broccoli or reheat the frozen broccoli separately.
Food safety: Refrigerate within 2 hours of cooking. Reheat leftovers until hot throughout — 165°F.
Frequently Asked Questions
How much protein is in each serving?
About 50–55g per serving when you divide 2 lbs of beef into 4 servings. The exact number depends on the cut and trimming of your beef. If you divide it into 5 servings, each serving lands at about 40–45g.
What’s the best cut of beef for crockpot beef and broccoli?
Flank steak has the strongest beefy flavor, but it has a narrow cooking window. Sirloin is slightly more forgiving and stays tender through a wider range of cook times. Both work well — sirloin is the safer choice if you’re worried about overcooking.
Why did my beef turn out chewy?
Two reasons: it was sliced with the grain instead of against it, or it was cooked too long. Thin-sliced beef is tender at 2½–3½ hours on LOW. Beyond that, it dries out and turns chewy.
Can I put the broccoli in at the beginning?
You can, but it will turn gray and mushy. Add the broccoli during the last 20–25 minutes on HIGH so it stays bright green and tender-crisp.
Why is my sauce thin?
Add the cornstarch slurry at the end, not the beginning. Cornstarch breaks down over a long cook. Stir it in during the last 5–10 minutes and cook on HIGH until the sauce thickens.
Can I make this in an Instant Pot?
Yes. Sear the beef on sauté mode, add the sauce, and cook on high pressure for 8–10 minutes, then let it release naturally for 10 minutes. Add the broccoli and cook on sauté mode for 3–5 minutes, then stir in the slurry and thicken.
Is this recipe gluten-free?
Yes, as written, if you use tamari instead of soy sauce and confirm your beef broth is gluten-free. Everything else is naturally gluten-free.
Is this recipe Whole30-friendly?
Not as written, because of the honey and cornstarch. Use coconut aminos instead of tamari, skip the honey, use arrowroot instead of cornstarch, and serve over cauliflower rice for a fully Whole30 version.
Can I double the recipe?
Yes. Use a 6-quart or larger slow cooker. Cooking time stays roughly the same, but you may need to add the broccoli in two batches so it doesn’t crowd the pot.
Can I use frozen broccoli?
Yes, but it won’t be as crisp. Add frozen broccoli in the last 12–15 minutes on HIGH instead of 20–25, and expect a softer texture. Fresh broccoli is much better here.
What do I serve with crockpot beef and broccoli?
Serve with brown rice, jasmine rice, cauliflower rice, lo mein noodles, or wide rice noodles. Steamed edamame on the side makes it a complete meal.
More High-Protein Crockpot Recipes You’ll Love
- Easy Crockpot Mongolian Beef With Garlic and Ginger
- Crockpot Pepper Steak: Simple, Tender & Packed with Flavor
- High-Protein Crockpot Steak and Potatoes: Muscle-Fueling Comfort Meal
Conclusion
This crockpot beef and broccoli is the high-protein takeout fakeout that earns a permanent spot in the rotation.
Thin-sliced flank steak, tender-crisp broccoli, and a savory garlic-ginger tamari sauce — about 50–55g of protein per serving when you divide the 2 lbs of beef into 4 portions.
The keys are simple: slice the beef thin against the grain, cook it on LOW for 2½–3½ hours (no longer), add the broccoli in the last 20–25 minutes on HIGH, and thicken the sauce with a cornstarch slurry at the end. Do that, and you’ll have beef and broccoli that tastes like takeout — without the sugar, sodium, or delivery fee.
Make it for a busy weeknight, meal prep it for the week, or serve it over rice for a family dinner. It freezes beautifully, and the leftovers are arguably better than the first serving.
