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Easy Slow Cooker Mongolian Beef Recipe

4.9 from 90 reviews

This Easy Slow Cooker Mongolian Beef recipe combines tender flank steak with a savory, sweet sauce made from ginger, garlic, soy sauce, and brown sugar. Prepared in a slow cooker, the beef becomes melt-in-your-mouth tender, perfect for a comforting weeknight dinner. Finished with a thickened sauce and garnished with fresh green onions, this dish offers rich flavor with minimal effort.

Ingredients

Scale

Beef and Marinade

  • 2 pounds flank steak, sliced thinly against the grain
  • 1 tablespoon fresh ginger, grated
  • 4 cloves garlic, minced
  • 1 cup low-sodium soy sauce
  • 1/4 cup brown sugar
  • 1 tablespoon sesame oil

Thickening Sauce

  • 2 tablespoons cornstarch
  • Water (for mixing with cornstarch, about 1/4 cup)

Garnish

  • Sliced green onions, for garnish

Instructions

  1. Slice the Steak: Cut the flank steak against the grain into thin strips to ensure tenderness and easy eating.
  2. Prepare the Marinade: In a large bowl, combine the sliced steak with grated ginger, minced garlic, low-sodium soy sauce, brown sugar, and sesame oil. Toss everything together until the steak is well coated with the marinade.
  3. Slow Cook the Beef: Transfer the marinated beef mixture into the slow cooker and spread it evenly. Cook on low heat for 6-7 hours or on high heat for 3-4 hours, until the beef is tender enough to be easily shredded with a fork.
  4. Thicken the Sauce: About 30 minutes before serving, mix the 2 tablespoons of cornstarch with water to create a slurry. Stir this mixture into the slow cooker to thicken the sauce, allowing it to cook for the remaining time.
  5. Serve and Garnish: Spoon the cooked Mongolian beef onto plates or bowls, and garnish with sliced green onions for a fresh, vibrant finish. Serve hot with steamed rice or your preferred side.

Notes

  • For best results, slice the flank steak thinly against the grain to maximize tenderness.
  • If you prefer a less sweet dish, reduce the brown sugar slightly.
  • Use low-sodium soy sauce to control salt levels in the dish.
  • The cornstarch slurry thickens the sauce, so be sure not to skip this step for a perfect consistency.
  • This dish pairs well with steamed rice or noodles and steamed vegetables.
  • You can prepare the beef in the morning and let it slow cook all day for convenience.

Keywords: slow cooker Mongolian beef, easy Mongolian beef recipe, flank steak slow cooker, sweet soy beef, ginger garlic beef