I’ve made this slow cooker beef and broccoli more times than I can count because it delivers tender slices of beef and a silky, savory sauce with almost no active time. It’s the kind of recipe that feels restaurant-worthy but fits perfectly into a busy weeknight routine — set it, forget it, and come back to dinner ready to serve over rice. If you like a stovetop version, you can compare techniques with my stove-top take here: stove-top beef and broccoli.

Why you’ll love this dish

This slow cooker version takes classic takeout flavors and makes them effortless.

Hands-off cooking: toss ingredients into the slow cooker and go — great for work days or hectic evenings.
Tender beef without fuss: slow, low heat breaks down connective tissue so flank or sirloin becomes melt-in-your-mouth.
Family-friendly and budget-smart: basic pantry ingredients turn inexpensive cuts into a crowd-pleaser.
Customizable: easy to swap proteins, add heat, or bulk it up with extra veggies.

“We served this on a rainy weeknight — the sauce was rich and the beef shredded perfectly without drying out. My kids asked for seconds.” — A weekday dinner win

The cooking process explained

Before you start, here’s a quick overview so you know what to expect: mix the sauce, coat the thinly sliced beef, slow-cook until tender, then add broccoli at the end so it stays bright and slightly crisp. The cornstarch in the sauce thickens as it cooks, giving you a glossy finish without a separate slurry. For a readier, braised-style dish, try a slow-cooker curry variation here: slow-cooker beef and potato curry.

Timeline at a glance:

Prep (slice beef, mince aromatics): 10–15 minutes
Slow cook: 2–5 hours depending on setting
Finish with broccoli: last 30 minutes
Serve over rice: immediate

What you’ll need

Key ingredients (serves 3–4):

1 pound beef (flank steak or sirloin), thinly sliced — slice against the grain for the most tender bites
4 cups broccoli florets (fresh or briefly blanched frozen)
1/2 cup soy sauce (use low-sodium if preferred)
1/4 cup brown sugar (light or dark)
2 tablespoons cornstarch (thickener)
2 tablespoons sesame oil (toasty flavor)
3 cloves garlic, minced
1 tablespoon ginger, grated (fresh gives best brightness)
1/4 cup water (or beef broth for extra depth)
Cooked rice, for serving

Substitutions/notes:

Coconut aminos can replace soy sauce for a gluten-free, lower-sodium option.
If you prefer a thicker sauce, you can increase cornstarch to 3 tablespoons or finish with a quick cornstarch slurry.
For a gluten-free dish, ensure soy sauce is tamari or use a gluten-free soy alternative.

How to prepare it

Whisk the sauce: combine soy sauce, brown sugar, cornstarch, sesame oil, minced garlic, grated ginger, and water in the slow cooker. Stir until smooth and there are no lumps of cornstarch.
Add beef: tuck the thinly sliced beef into the sauce and toss so every piece is coated. Spread it out so the meat cooks evenly.
Slow cook: cover and cook on LOW for 4–5 hours or on HIGH for 2–3 hours. You’re aiming for tender beef that still holds its shape.
Add broccoli: stir in the broccoli florets during the last 30 minutes of cooking so they stay bright green and have a little bite. If you like very tender broccoli, add 45–60 minutes before the end on LOW.
Finish and serve: give the sauce a stir. If it looks thin, mash a little cornstarch into a tablespoon of cold water and stir it in, then cook 5–10 more minutes. Serve hot over cooked rice.

Best ways to enjoy it

Classic plating: spoon the beef and broccoli over steamed jasmine or brown rice and drizzle any extra sauce on top.
Noodles: toss with udon or chow mein noodles for a comforting noodle bowl.
Bowls and toppings: top with sliced green onions, toasted sesame seeds, and a little chili crisp for heat.
Lighter option: serve over cauliflower rice or a bed of wilted spinach for fewer carbs.

Pair with a crisp cucumber salad or simple pickled carrots to cut through the sauce’s richness.

Storage and reheating tips

Refrigerator: store leftovers in an airtight container within two hours of cooking. Keep for up to 3–4 days.
Freezing: cool completely, then freeze in a freezer-safe container for up to 2 months. Thaw overnight in the fridge before reheating.
Reheating: gently reheat on the stovetop over medium-low or in the microwave in 30–45 second bursts, stirring between intervals. Add a splash of water or broth if the sauce has thickened too much.
Food safety: when reheating, bring to at least 165°F (74°C) before serving.

Pro chef tips

Slice beef thin and against the grain: this shortens fibers and maximizes tenderness even with less cooking time.
Browning not required but optional: quickly searing the beef beforehand adds flavor; just don’t crowd the pan.
Prevent gummy sauce: avoid over-stirring once the beef is in the slow cooker; this helps meat keep its texture.
Broccoli timing matters: adding it too early yields mush; 20–30 minutes preserves color and crunch.
Taste and adjust: brown sugar balances soy’s saltiness — if your soy sauce is low-sodium, you may want a touch more sugar or a splash of oyster sauce for depth.

Creative twists

Spicy sesame: add 1–2 teaspoons of Sriracha or a tablespoon of gochujang to the sauce.
Citrus brightening: finish with a teaspoon of rice vinegar or a squeeze of lime for brightness.
Mushroom and pepper boost: add sliced shiitake or bell peppers with the broccoli for more bulk.
Slow-cooker stew spin: swap broccoli for potatoes and carrots and use beef stew cuts, following a similar slow-cook approach — see a hearty stew version here: slow-cooker beef stew and dumplings.
Vegetarian swap: use sliced seitan or thick tofu and swap beef broth for vegetable broth.

Your questions answered

Q: Can I use frozen broccoli?
A: Yes — add frozen broccoli in the last 30 minutes of cooking. It will release water, so check sauce thickness and cook a bit longer if needed.

Q: What’s the best beef cut for this recipe?
A: Flank steak or sirloin work well thanks to their beefy flavor and ability to be sliced thin. For slow-cooker braising, chuck roast is an option but plan for longer cooking and shredding.

Q: Do I need to brown the beef first?
A: No, the slow cooker tenderizes the meat without browning. Searing adds a deeper flavor but isn’t necessary.

Q: How to thicken the sauce if it’s thin?
A: Stir together 1 tablespoon cornstarch with 1 tablespoon cold water and whisk into the hot sauce. Cook an extra 5–10 minutes until thickened.

Q: Is this recipe gluten-free?
A: Not as written unless you use tamari or another gluten-free soy substitute. Also check any added sauces for hidden gluten.

Conclusion

If you want more slow-cooker ideas or alternate takes on beef-and-broccoli, these two guides are excellent resources: try the full write-up at Easy Slow Cooker Beef and Broccoli Recipe | The Recipe Critic for a similar, hands-off approach, and see Slow Cooker Beef and Broccoli – RecipeTin Eats for another trusted variation and extra tips.

Slow Cooker Beef and Broccoli

Tender slices of beef in a silky, savory sauce made effortlessly in a slow cooker, perfect for busy weeknights.

Prep Time 15

Cook Time 4

Total Time 4 15

Serving Size servings

Ingredients

Key Ingredients

1 pound beef (flank steak or sirloin), thinly sliced Slice against the grain for the most tender bites.
4 cups broccoli florets Fresh or briefly blanched frozen.
1/2 cup soy sauce Use low-sodium if preferred.
1/4 cup brown sugar Light or dark.
2 tablespoons cornstarch Thickener.
2 tablespoons sesame oil Toasty flavor.
3 cloves garlic, minced
1 tablespoon ginger, grated Fresh gives best brightness.
1/4 cup water Or beef broth for extra depth.
Cooked rice For serving.

Instructions

Preparation

Whisk together soy sauce, brown sugar, cornstarch, sesame oil, minced garlic, grated ginger, and water in the slow cooker until smooth.
Add the thinly sliced beef to the sauce and toss until each piece is coated. Spread it out evenly.

Cooking

Cover and cook on LOW for 4–5 hours or on HIGH for 2–3 hours until beef is tender.
Add broccoli florets during the last 30 minutes of cooking to keep them bright green.

Finishing

Stir the sauce. If it looks thin, mix an extra tablespoon of cornstarch with a tablespoon of cold water and add it to the sauce, cooking for an additional 5–10 minutes.
Serve hot over cooked rice.