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Slow Cooker Mongolian Beef

Featured in Simple Beef Recipes.

Tried making Mongolian beef in the slow cooker yesterday and wow so much easier than takeout! Just tossed everything in before work and came home to the best smell ever. The meat got so tender it just fell apart. The sauce got all sticky and sweet just like at restaurants. My kids who usually only want chicken gobbled it up. Made extra sauce for rice. Love having takeout flavors without the cost. Definitely making this again when we want Chinese food.
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Mina cooking in her kitchen
Updated on Thu, 09 Jan 2025 18:09:09 GMT
A close-up view of succulent beef strips glazed in a savory sauce, garnished with sesame seeds and green onions, served over a bed of white rice. Pin it
A close-up view of succulent beef strips glazed in a savory sauce, garnished with sesame seeds and green onions, served over a bed of white rice. | lastminrecipes.com

Easy Slow Cooker Mongolian Beef Recipe

This slow cooker Mongolian beef transforms simple flank steak into something absolutely magical. The meat gets so tender it practically melts in your mouth while that sweet and savory sauce infused with garlic and soy creates the most amazing flavor. I love how my slow cooker does all the work making this restaurant favorite right in my kitchen.

Why This Mongolian Beef Works Every Time

The beauty of this slow cooker Mongolian beef is how hands off it is while creating something that tastes like it came from your favorite restaurant. The slow cooking process makes the beef incredibly tender while developing those rich sweet and savory flavors. It's perfect for those busy days when you want something amazing for dinner without the fuss.

What You'll Need

  • Flank Steak: Slice it thin against the grain for the most tender bites.
  • Cornstarch: Creates that perfect texture we all love.
  • Soy Sauce: The heart of our amazing sauce.
  • Brown Sugar: Adds that wonderful sweet balance.
  • Carrots: They add such nice natural sweetness.
  • Garlic: Makes everything taste better.

Let's Get Cooking

Start With Your Beef
Slice it nice and thin then give it a good coating of cornstarch.
Make Your Sauce
Mix up that gorgeous combination of soy sauce garlic and brown sugar.
Into The Slow Cooker
Add your beef and carrots then pour that amazing sauce all over.
Let It Cook
Now let your slow cooker work its magic for a few hours.
Time To Serve
Pile it over hot rice add some green onions and sesame seeds.

My Kitchen Secrets

Always cut your beef against the grain it makes such a difference in tenderness. Love vegetables? Toss in some broccoli or peppers near the end. Got an Instant Pot? This works great in there too just sear the meat first. The leftovers taste amazing and freeze beautifully for quick future dinners.

A close-up view of a slow cooker filled with tender beef strips, carrots, and green onions in a glossy brown sauce, with a wooden spoon ready to serve. Pin it
A close-up view of a slow cooker filled with tender beef strips, carrots, and green onions in a glossy brown sauce, with a wooden spoon ready to serve. | lastminrecipes.com

Frequently Asked Questions

→ Why coat the beef in cornstarch?
Cornstarch helps tenderize the meat and thicken the sauce while cooking.
→ Can I use different cuts of beef?
While flank steak is traditional, you can use sirloin or chuck steak cut thin against the grain.
→ Is this very sweet?
The brown sugar balances with the soy sauce. Reduce sugar if you prefer less sweetness.
→ Can I add other vegetables?
Yes, bell peppers or broccoli work well. Add them in the last hour to prevent overcooking.
→ Why grate the carrots?
Grated carrots melt into the sauce, adding sweetness and nutrition without changing texture.

Slow Cooker Mongolian Beef

Tender flank steak slow-cooked in a sweet and savory Asian-inspired sauce. An easy dinner that's better than takeout.

Prep Time
10 Minutes
Cook Time
240 Minutes
Total Time
250 Minutes
By: Mina

Category: Beef

Difficulty: Easy

Cuisine: Asian-American

Yield: 6 Servings (1 pot)

Dietary: Dairy-Free

Ingredients

01 1½ pounds flank steak.
02 1/4 cup cornstarch.
03 2 tablespoons olive oil.
04 1 teaspoon garlic, minced.
05 3/4 cup soy sauce.
06 3/4 cup water.
07 3/4 cup brown sugar.
08 1 cup carrots, grated.
09 Green onions for garnish.
10 Sesame seeds for garnish.

Instructions

Step 01

Cut flank steak into thin strips.

Step 02

Coat steak with cornstarch in ziplock bag.

Step 03

Mix oil, garlic, soy sauce, water, sugar.

Step 04

Pour sauce into slow cooker.

Step 05

Add carrots and coated steak.

Step 06

Stir to coat meat with sauce.

Step 07

Cook on high 2-3 hours or low 4-5 hours.

Step 08

Serve over rice.

Step 09

Garnish with green onions and sesame seeds.

Notes

  1. Cut meat against the grain.
  2. Can use other beef cuts if sliced thin.
  3. Add vegetables in last hour.
  4. Adjust sugar to taste.

Tools You'll Need

  • Slow cooker.
  • Ziplock bag.

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Soy (soy sauce).
  • Wheat (if using regular soy sauce).

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 348
  • Total Fat: 10 g
  • Total Carbohydrate: 36 g
  • Protein: 28 g