There are some nights when dinner needs to practically cook itself. You know the kind: work ran late, the laundry pile somehow doubled, and everyone is asking what’s for dinner before you’ve even thought about it. That’s exactly when Slow Cooker Mongolian Beef earns its place in your weeknight rotation.
Tender slices of beef simmer in a glossy, sweet-savory sauce flavored with fresh ginger, garlic, soy sauce, and just enough heat to wake everything up. The slow cooker handles most of the work while you get on with your day. By dinnertime, your kitchen smells like you’ve been cooking for hours—which, technically, you have. You just didn’t have to stand there doing it!
I’m Chef Omar, and recipes like this are exactly what I love sharing at PulseRecipes: approachable ingredients, straightforward steps, and plenty of flavor. Serve this beef over fluffy steamed rice with broccoli on the side, and you have a cozy dinner that feels far more special than the effort involved.
Table of Contents
Why You’ll Love This Slow Cooker Mongolian Beef
- Quick Prep: A little slicing and whisking are all you need before the slow cooker takes over.
- Big Flavor: Garlic, ginger, soy sauce, brown sugar, and sesame oil create a rich sweet-and-savory sauce.
- Family-Friendly: The mild base works well for the whole family, while red pepper flakes can add extra heat for spice lovers.
- Simple Ingredients: Everything is easy to find at a typical grocery store, with no specialty shopping required.
- Great for Busy Days: Cook it on Low for four hours or High for about two, depending on your schedule.
- Easy to Complete: Add rice or noodles and steamed broccoli for a satisfying dinner without juggling several complicated dishes.
Ingredients You’ll Need
The ingredient list is pleasantly straightforward, but each item has a job to do.
For the Beef
- 2 pounds flank steak or top sirloin, thinly sliced against the grain
- 6 tablespoons cornstarch
- 3 tablespoons vegetable or avocado oil, optional
Flank steak is a fantastic choice because thin slices become tender while soaking up all that sauce. Top sirloin works nicely, too.
Cornstarch may look like a small detail, but don’t skip it. Coating the beef helps give the finished sauce its luscious, cling-to-every-bite texture.
For the Mongolian-Style Sauce
- 3/4 cup low-sodium soy sauce
- 3/4 cup packed brown sugar
- 3/4 cup water
- 1 1/2 tablespoons rice vinegar
- 1 1/2 tablespoons freshly grated ginger, or 1/2 teaspoon ground ginger
- 1 tablespoon minced garlic
- 1/2 teaspoon crushed red pepper flakes, optional
Low-sodium soy sauce is especially helpful here because you’re using a generous amount. It provides plenty of savory depth without making the finished dish overwhelmingly salty.
Brown sugar balances that savory flavor with the signature sweetness people love in Mongolian-style beef. Fresh ginger and garlic bring warmth and aroma, while red pepper flakes provide an optional little kick.
For the Finishing Touches
- 1 cup grated carrot
- 2 teaspoons sesame oil
- 1–2 teaspoons rice vinegar
- 2 green onions, thinly sliced
- 1 tablespoon toasted sesame seeds
Adding the carrots near the end lets them soften slightly while keeping some texture. Sesame oil goes in late, too, so its nutty aroma stays bright instead of disappearing during the long cooking time.
How to Make Slow Cooker Mongolian Beef
1. Slice the Beef
Slice 2 pounds of flank steak or top sirloin thinly against the grain.
This matters. Cutting against the grain shortens the muscle fibers and makes each bite easier to chew. If your steak is difficult to slice thinly, place it in the freezer for about 20–30 minutes first. Slightly firm beef is much easier to handle with a sharp knife.
2. Coat It With Cornstarch
Place the sliced beef in a large mixing bowl and add 6 tablespoons of cornstarch. Toss until the pieces are evenly coated.
You don’t need a heavy white coating. Just make sure the cornstarch is distributed across the meat.
3. Whisk Together the Sauce
In a separate bowl or large measuring cup, combine the low-sodium soy sauce, brown sugar, water, 1 1/2 tablespoons rice vinegar, ginger, garlic, and crushed red pepper flakes if you’re using them.
Whisk until everything is well combined.
At this stage, the sauce may seem fairly thin. That’s normal. The cornstarch coating on the beef will help transform it as everything cooks.
4. Load the Slow Cooker
Place the coated beef in your slow cooker.
Pour the prepared sauce over it and gently stir so the meat is evenly coated. Drizzle in 3 tablespoons of vegetable or avocado oil if desired. The oil is optional, but it gives the finished sauce a little extra richness.
Now comes the easiest part: put on the lid and walk away.
5. Cook Until Tender
Cook your Slow Cooker Mongolian Beef on Low for about 4 hours or High for about 2 hours.
The beef should become tender, and the sauce should thicken into a glossy coating.
Slow cookers vary, so start checking around the suggested cooking time rather than automatically leaving the beef in longer. Unlike a large roast, thin strips of steak don’t need an all-day cooking marathon.
6. Add the Final Ingredients
During the final 15–20 minutes, stir in the grated carrot, 2 teaspoons sesame oil, and 1–2 teaspoons rice vinegar.
Taste the sauce before deciding whether to add the full 2 teaspoons of vinegar. That final splash of acidity helps balance the sweetness and richness.
This is one of my favorite little chef tricks: when something tastes rich but slightly flat, a touch of acidity can make the flavors suddenly snap into focus.
7. Garnish and Serve
Spoon the hot Mongolian beef over steamed white or brown rice. Noodles are another delicious option if that’s what your family prefers.
Finish each serving with thinly sliced green onions and toasted sesame seeds. Add steamed broccoli on the side—or right into the bowl—and dinner is officially handled.
Chef Omar’s Tips for Better Mongolian Beef
- Slice against the grain. I know I’ve mentioned it already, but it deserves repeating. Thin, properly sliced steak makes a noticeable difference in tenderness.
- Use low-sodium soy sauce. Regular soy sauce can make this recipe considerably saltier. Low-sodium gives you better control over the final flavor.
- Don’t add sesame oil too early. Sesame oil is wonderfully aromatic, and prolonged cooking can dull its flavor. Stirring it in near the end keeps that toasted, nutty character alive.
- Adjust the sweetness to your taste. If your household prefers a less-sweet sauce, you can reduce the brown sugar slightly. Just remember that sweetness is part of the classic sweet-savory balance of this dish.
- Give the beef some breathing room after cooking. Stir gently when serving. The tender strips have spent hours getting cozy in that sauce; there’s no need to attack them with a spoon like you’re digging for buried treasure.
What to Serve With Mongolian Beef
Steamed rice is the easiest pairing because it absorbs the flavorful sauce beautifully. Jasmine rice is particularly good when you want something fragrant, while brown rice adds a heartier texture.
For vegetables, steamed broccoli is hard to beat. Its fresh flavor balances the rich beef, and those little florets are excellent at catching extra sauce.
You could also serve the beef with green beans, snow peas, roasted vegetables, or a simple cucumber salad. For a noodle bowl, spoon the beef and sauce over cooked lo mein-style noodles and add your favorite crisp vegetables.
This is also the kind of recipe I love putting out when friends come over. It looks colorful once you add green onions, carrots, and sesame seeds, but you’re not trapped in the kitchen while everyone else is having fun. That’s always a win in my book.
faqs about Slow Cooker Mongolian Beef
Can I use a different cut of beef?
Yes. Flank steak and top sirloin both work well, but other tender beef cuts can also be used. Whatever you choose, slice it thinly against the grain for the best texture.
Is Slow Cooker Mongolian Beef spicy?
Not necessarily. The crushed red pepper flakes are optional. Leave them out for a mild, family-friendly version, or add more if your household enjoys some heat.
Can I use ground ginger instead of fresh?
Yes. Substitute about 1/2 teaspoon ground ginger for the 1 1/2 tablespoons fresh ginger. Fresh ginger provides a brighter flavor, but ground ginger is a convenient pantry backup.
Why is my sauce too thin?
The cornstarch coating should help thicken the sauce as it cooks. If yours still seems thin near the end, leave the lid slightly ajar for a short period so some moisture can escape, keeping an eye on the beef so it doesn’t overcook.
Can I add more vegetables?
Absolutely. Broccoli, snow peas, bell peppers, or green beans can turn this into an even more complete meal. Add quick-cooking vegetables toward the end so they don’t become overly soft.
What can I use instead of rice?
Try noodles, cauliflower rice, quinoa, or even a bowl of steamed vegetables. There’s enough sauce here to make almost any simple base taste fantastic.
Make Tonight’s Dinner Deliciously Easy
Busy evenings don’t need to end with boring dinners. A good slow-cooker recipe gives you the best of both worlds: minimal hands-on work and a meal that still feels comforting and thoughtfully prepared.
This Slow Cooker Mongolian Beef brings together tender steak, a glossy garlic-ginger sauce, crisp-tender carrots, nutty sesame oil, and fresh green onions in one seriously satisfying dish. Pair it with rice and broccoli, and you’ve got the kind of dinner that makes everyone wander into the kitchen asking, “When do we eat?”
So grab that slow cooker, slice your beef, and let dinner mostly take care of itself. Sometimes the smartest cooking move is knowing when to let the appliance do the heavy lifting.
More Flavor-Packed Recipes to Try
If this Slow Cooker Mongolian Beef earned a spot in your dinner rotation, keep those bold, savory flavors coming with a few more Pulse Recipes favorites:
- Craving another beef dinner with plenty of veggies? Try this easy Beef Stir Fry with Vegetables for a colorful weeknight meal loaded with satisfying flavor.
- If beef and broccoli is your favorite takeout combination, this Chinese Beef and Broccoli recipe is a natural next choice for another savory, Asian-inspired dinner.
- For another sweet-and-savory beef meal that’s perfect over rice, add this Korean Beef Bowl to your weeknight recipe lineup.
- Want to put your slow cooker right back to work? This Slow Cooker Garlic Butter Beef with Potatoes delivers tender beef and cozy comfort-food flavor with minimal hands-on time.
Made this Slow Cooker Mongolian Beef? ⭐⭐⭐⭐⭐ Leave a star rating and review below! Tell us how it turned out, what you served with it, and whether your family went back for seconds. Your feedback helps other home cooks discover recipes they’ll love, too!
Slow Cooker Mongolian Beef
- Total Time: 4 hours 15 minutes
- Yield: 6 servings 1x
Description
Tender, saucy, and packed with sweet-savory flavor, this Slow Cooker Mongolian Beef combines thinly sliced beef with garlic, ginger, soy sauce, and brown sugar. The slow cooker does most of the work, making it an easy family dinner that’s delicious served over steamed rice with broccoli.
Ingredients
- 2 pounds flank steak or top sirloin, thinly sliced against the grain
- 6 tablespoons cornstarch
- 3 tablespoons vegetable or avocado oil, optional
- 3/4 cup low-sodium soy sauce
- 3/4 cup packed brown sugar
- 3/4 cup water
- 1 1/2 tablespoons rice vinegar
- 1 1/2 tablespoons freshly grated ginger, or 1/2 teaspoon ground ginger
- 1 tablespoon minced garlic
- 1/2 teaspoon crushed red pepper flakes, optional
- 1 cup grated carrot
- 2 teaspoons sesame oil
- 1–2 teaspoons rice vinegar, for finishing
- 2 green onions, thinly sliced, for garnish
- 1 tablespoon toasted sesame seeds, for garnish
Instructions
- Prepare the beef: Thinly slice the flank steak or top sirloin against the grain. Place the beef in a large mixing bowl, add the cornstarch, and toss until evenly coated.
- Make the sauce: In a separate bowl, whisk together the low-sodium soy sauce, brown sugar, water, 1 1/2 tablespoons rice vinegar, grated ginger, minced garlic, and crushed red pepper flakes, if using.
- Fill the slow cooker: Add the coated beef to the slow cooker. Pour the prepared sauce over the beef and gently stir to coat. Drizzle with vegetable or avocado oil, if using.
- Slow cook: Cover and cook on Low for 4 hours or High for 2 hours, until the beef is tender and the sauce has thickened.
- Add the finishing ingredients: During the final 15–20 minutes, stir in the grated carrot, sesame oil, and 1–2 teaspoons rice vinegar.
- Serve: Spoon the Mongolian beef over steamed rice or noodles. Garnish with sliced green onions and toasted sesame seeds. Serve with steamed broccoli, if desired.
Notes
- Slice against the grain: This helps keep the beef tender instead of chewy.
- Use low-sodium soy sauce: Regular soy sauce may make the finished dish considerably saltier.
- For easier slicing: Place the beef in the freezer for 20–30 minutes before slicing. Slightly firm beef is easier to cut thinly.
- Adjust the heat: Leave out the crushed red pepper flakes for a mild version or increase them for more spice.
- Don’t overcook: Thin strips of beef cook faster than a large roast, so check for tenderness around the recommended cooking time.
- Rice and broccoli: These make excellent sides, but they are not included in the recipe’s ingredient amounts or estimated nutrition below.
- Storage: Refrigerate leftovers in an airtight container and use within 3–4 days.
- Prep Time: 15 minutes
- Cook Time: 4 hours
- Category: Dinner
- Method: Slow Cooker
- Cuisine: Asian-Inspired
Nutrition
- Serving Size: 1/6 of recipe
- Calories: 560 kcal
- Sugar: 29 g
- Sodium: 1300 mg
- Fat: 25 g
- Saturated Fat: 8 g
- Unsaturated Fat: 15 g
- Trans Fat: 0 g
- Carbohydrates: 44 g
- Fiber: 1 g
- Protein: 39 g
- Cholesterol: 100 mg