Go Back
+ servings

Slow Cooker Mongolian Beef

This Slow Cooker Mongolian Beef is easier, tastier, and healthier than takeout! Flank steak is slow cooked until tender in a sweet, sticky, perfectly spiced sauce.
Prep Time15 mins
Cook Time2 hrs
Total Time2 hrs 15 mins
Course: Dinner, Lunch
Cuisine: Chinese
Keyword: easy, flank steak, slow cooker
Servings: 4 people
Calories: 437kcal
Author: Jennifer Debth




  • 1 1/2 pounds flank steak halved lengthwise, then sliced against the grain into 1/2 inch thick strips
  • 1/4 cup cornstarch
  • 1/2 cup dark brown sugar packed
  • 1/2 cup soy sauce use a gluten free variety (tamari or coconut aminos), if necessary
  • 1 cup beef broth
  • 1 tablespoon hoisin sauce check label to ensure it's gluten free, if necessary
  • 1 tablespoon seasoned rice vinegar
  • 1 tablespoon sesame oil
  • 1 teaspoon crushed red pepper flakes use less or omit if you don’t like spice - this has a kick!
  • 1/2 teaspoon ground ginger
  • 4 cloves garlic minced
  • Cooked rice for serving
  • Chopped green onions for garnish


  • Toss flank steak and cornstarch together in a medium sized bowl until the cornstarch fully coats the steak. Set aside.
  • Grease a 6 quart crockpot with cooking spray, then whisk in brown sugar, soy sauce, broth, hoisin, vinegar, sesame oil, red pepper flakes, ginger, and garlic.
  • Stir in coated steak.
  • Cover and cook on HIGH for 2-3 hours or LOW for 4-5 hours.
  • Taste and re-season, if necessary.
  • Serve with rice and garnish with green onions!
  • Take 5 seconds to rate this recipe below. We greatly appreciate it!



Nutrition information does not include rice or green onions.


Serving: 1person | Calories: 437kcal | Carbohydrates: 39g | Protein: 41g | Fat: 12g | Saturated Fat: 4g | Cholesterol: 102mg | Sodium: 2015mg | Potassium: 741mg | Fiber: 1g | Sugar: 28g | Vitamin A: 149IU | Vitamin C: 1mg | Calcium: 77mg | Iron: 4mg