If takeout beef and broccoli is one of your go-to comfort meals, you’ll love this slow cooker version. It has the rich, savory, slightly sweet sauce of your favorite Chinese restaurant dish, but it’s made at home with very little work.

Toss the beef and sauce into the crockpot, let it cook for a few hours, then stir in the broccoli near the end. Serve it over rice and dinner is done. It’s cheaper than takeout, and you control the salt and sugar.

Why This Crockpot Beef and Broccoli Works

Flank steak is lean but has a lot of beefy flavor. When you slice it thin against the grain and cook it low and slow, it turns very tender. The long cook also lets it soak up the sauce.

The sauce is a mix of beef broth, low-sodium soy sauce, brown sugar, hoisin, garlic, and fresh ginger. Soy and hoisin bring salty, savory depth. Brown sugar balances the salt and helps the sauce turn glossy. A cornstarch slurry at the end thickens it so it clings to the beef and broccoli just like the restaurant version.

Adding the broccoli for only the last 30 minutes is key. It steams in the hot sauce and stays bright green and tender-crisp instead of turning to mush.

Ingredients and Easy Swaps

• Flank steak: Thinly sliced against the grain. Sirloin or skirt steak work too. Chuck roast is a budget option that gets very tender with long cooking.
• Beef broth: Half a cup. Low-sodium broth keeps the salt in check.
• Low-sodium soy sauce: Half a cup. Use tamari or coconut aminos for gluten free.
• Brown sugar: One quarter cup. Honey works in its place.
• Hoisin sauce: Two tablespoons. Oyster sauce is a good swap.
• Garlic and ginger: Three cloves of garlic and 1 teaspoon of fresh grated ginger. Jarred ginger paste is fine.
• Red pepper flakes: Optional, for a little heat.
• Cornstarch and water: Two tablespoons of each make the slurry that thickens the sauce.
• Broccoli: Four cups of florets. Frozen broccoli works; add it straight from frozen.
• To serve: White or brown rice, sesame seeds, and sliced green onions.

How to Make It at a Glance

1. Place the sliced flank steak in the crockpot.
2. Whisk the broth, soy sauce, brown sugar, hoisin, garlic, ginger, and red pepper flakes. Pour it over the beef.
3. Cover and cook on low for 4 to 5 hours, until the beef is tender.
4. Mix the cornstarch and water until smooth. Stir it in and add the broccoli.
5. Cover and cook 30 more minutes, until the sauce is thick and the broccoli is tender-crisp.
6. Serve over rice with sesame seeds and green onions.

How to Slice Flank Steak Thin

Thin slices are what make this taste like the takeout version. Start by wrapping the steak and placing it in the freezer for 20 to 30 minutes. It should feel firm but not frozen solid. Firm meat is much easier to cut evenly.

Use your sharpest knife. Find the grain, which looks like long lines running down the steak. Turn the steak so your knife cuts across those lines. Aim for slices about 1/4 inch thick. If the slices are very long, cut them in half so they’re bite size.

Common Mistakes to Avoid

Slicing with the grain. Look for the long lines running through the steak and cut across them. That keeps every bite tender. Partly freezing the steak for 20 to 30 minutes makes thin slicing much easier.

Adding broccoli too early. If it cooks for hours, it turns gray and falls apart. Wait until the last 30 minutes.

Using regular soy sauce. Full-sodium soy sauce plus broth and hoisin can make the dish too salty. Stick with low sodium.

Lumpy slurry. Mix the cornstarch with cold water, not hot, and stir until no lumps remain before adding it.

Variations

• Add more veggies: Toss in sliced bell peppers, snap peas, or carrots with the broccoli.
• Sesame finish: Stir in 1 teaspoon of toasted sesame oil right before serving.
• Make it spicy: Add a spoonful of sriracha or chili garlic sauce to the sauce.
• Use chicken: Swap in sliced chicken thighs and cook until they reach 165°F.

What to Serve With It

Steamed white or brown rice is the classic choice. Fried rice, lo mein noodles, or cauliflower rice also work. Add egg rolls, potstickers, or a simple cucumber salad for a full takeout-style night at home.

Make Ahead, Storage, and Reheating

Make ahead: Slice the beef and whisk the sauce the night before. Store them in the fridge in separate containers.

Storage: Leftovers keep in an airtight container in the fridge for up to 4 days. The beef and sauce freeze well for up to 3 months, though the broccoli will be softer after thawing.

Reheating: Warm in a skillet over medium heat with a splash of water or broth, or microwave in 1-minute bursts, stirring in between.

Frequently Asked Questions

Can I cook this on high?
Yes. Cook on high for about 2 to 3 hours, then add the slurry and broccoli for the last 30 minutes.

Do I need to brown the beef first?
No. It’s optional. Searing adds a little extra flavor, but the recipe works well without it.

Why is my sauce thin?
Make sure the crockpot is hot when you add the slurry, and keep the lid on. If it’s still thin, mix another tablespoon of cornstarch with water and stir it in.