Crock pot beef and broccoli brings takeout flavor to your own kitchen with almost no work. Thin slices of flank steak cook slowly in a ginger, garlic, and soy sauce until tender, then a quick cornstarch slurry thickens the sauce and fresh broccoli finishes in the last half hour so it stays bright and crisp-tender.
This recipe serves four and fits a busy day. A short prep session in the morning gives you a glossy, savory dinner that is ready to spoon over rice. Below you will find the ingredients, the full method, serving ideas, storage guidance, and answers to the questions people ask most.
Table of Contents
Why This Works
Slow cooking suits beef that is sliced thin. Flank steak and sirloin are lean, so they need gentle, moist heat to turn tender rather than chewy. Cutting the meat across the grain shortens the muscle fibers, which means every bite pulls apart easily after hours in the sauce.
The timing is what keeps the dish from turning into mush. Flank steak is done in about four to five hours on low, so cooking it much longer starts to dry the meat out. The broccoli goes in only for the final 30 minutes, long enough to turn tender but not long enough to fade to gray.
Thickening the sauce with a cornstarch slurry, mixed with cold water first, gives a smooth glaze without lumps. Dropping dry cornstarch straight into hot liquid clumps, so always whisk it in water before it goes in.
Ingredients
- 1 lb flank steak or sirloin, sliced thin against the grain
- 4 cups broccoli florets
- 1/3 cup low-sodium soy sauce (use gluten-free soy sauce for a gluten-free meal)
- 1/2 cup low-sodium beef broth
- 2 tbsp brown sugar
- 2 cloves garlic, minced
- 1 tbsp fresh ginger, minced
- 1 tbsp cornstarch
- 2 tbsp cold water
- Black pepper, to taste
- 4 cups cooked rice, for serving
Soy sauce is salty, so no extra salt is listed. Taste the finished sauce before adding any.
How to Make Crock Pot Beef and Broccoli
1. Mix the sauce
In the slow cooker, whisk together the soy sauce, beef broth, brown sugar, garlic, and ginger until the sugar dissolves.
2. Add the beef
Add the thin slices of beef and stir so each piece is coated in the sauce. Spread them out so they sit in the liquid rather than piled on top.
3. Cook low and slow
Cover and cook on low for 4 to 5 hours, or on high for 2 to 3 hours, until the beef is tender. Slow cookers vary, so start checking at the early end of the range.
4. Thicken the sauce
About 30 minutes before serving, whisk the cornstarch with the cold water in a small bowl until smooth. Stir the slurry into the slow cooker so the sauce can thicken as it finishes.
5. Add the broccoli
Add the broccoli florets, cover, and cook for the final 30 minutes, until the broccoli is tender-crisp and the sauce is glossy. Season with black pepper if you like.
6. Serve over rice
Spoon the beef, broccoli, and sauce over hot cooked rice and serve right away, with extra sauce at the table.
How to Serve
Rice is the classic base, and for a more exciting plate, spoon the beef over easy fried rice or a simple scoop of garlic butter rice. Both soak up the sauce beautifully.
For a takeout-style spread, add a few crisp egg rolls and a bowl of cool Asian cucumber salad to freshen up each bite.
How to Store and Reheat
Refrigerate leftovers in an airtight container within two hours of cooking, and plan to eat them within 3 to 4 days. Keep the sauce and beef together so the meat stays moist.
Reheat in the microwave in short bursts or in a saucepan over low heat until steaming hot, adding a splash of water if the sauce has thickened in the fridge. Do not reheat leftovers in the slow cooker itself, since it warms food too slowly.
Tips and Variations
Slicing the beef thin is easier when the steak is partly firm. Slide it into the freezer for a short time before cutting, and always cut across the grain. If your butcher offers pre-sliced flank steak, that works too.
Add carrots, snow peas, or sliced bell peppers along with the broccoli for a heartier bowl. If you like heat, whisk a pinch of red pepper flakes into the sauce at the start. Sirloin and boneless chuck can replace flank steak, though chuck may need the longer end of the cooking range.
For safe slow cooker use, the Clemson Home and Garden Information Center slow cooker guide advises against reheating leftovers in the slow cooker.
FAQ
Can I cook the beef on high instead of low?
Yes. Use the high setting for 2 to 3 hours. The beef will be tender, though low and slow gives the most relaxed texture.
Can I use frozen broccoli?
You can. Frozen florets work in the last 30 minutes, though they soften a little faster, so add them at the end and watch the texture.
Why is my sauce thin?
The slurry needs time and heat to thicken. Make sure it is stirred in and the lid is on for the final half hour. If it is still thin, whisk in a little more cornstarch mixed with cold water and cook a few more minutes.
Why is my beef tough?
Tough beef usually means it was sliced with the grain or cooked too long. Cut across the grain and stay within the suggested time range for the setting you chose.
Is this recipe gluten-free?
It can be. Use gluten-free soy sauce and check that your beef broth and cornstarch are labeled gluten-free as well.
Crock Pot Beef and Broccoli with Ginger and Garlic
Ingredients
Main Ingredients
- 1 lb flank steak or sirloin sliced thin against the grain
- 4 cup broccoli florets
- ⅓ cup low-sodium soy sauce use gluten-free soy sauce if needed
- ½ cup low-sodium beef broth
- 2 tbsp brown sugar
- 2 cloves garlic minced
- 1 tbsp fresh ginger minced
- 1 tbsp cornstarch
- 2 tbsp cold water for the slurry
- black pepper to taste
- 4 cup cooked rice for serving
Instructions
Cooking
- In the slow cooker, whisk together the soy sauce, beef broth, brown sugar, garlic, and ginger.
- Add the sliced beef and stir to coat.
- Cover and cook on low 4 to 5 hours or on high 2 to 3 hours until the beef is tender.
- About 30 minutes before serving, whisk the cornstarch with the cold water and stir it into the slow cooker.
- Add the broccoli, cover, and cook the final 30 minutes until tender-crisp and the sauce is glossy. Season with pepper.
- Serve the beef, broccoli, and sauce over hot cooked rice.
