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Slow Cooker Mongolian Beef Recipe

4.7 from 381 reviews

Slow Cooker Mongolian Beef is a flavorful and easy-to-make dish featuring tender flank steak cooked slowly in a sweet and savory garlic-ginger soy sauce. This Asian-inspired recipe is perfect for busy evenings, delivering rich restaurant-style taste with minimal effort. Serve it over rice or noodles for a satisfying meal that the whole family will love.

Ingredients

Scale

For the Beef

  • 1 1/2 pounds flank steak, thinly sliced against the grain
  • 1/4 cup cornstarch

For the Sauce

  • 1 tablespoon toasted sesame oil
  • 1 teaspoon minced garlic
  • 1 teaspoon minced ginger
  • 1/2 cup low sodium soy sauce
  • 1/3 cup brown sugar
  • 1/2 cup water

For Garnish

  • 1/2 cup green onions, cut into 1/2 inch pieces

Instructions

  1. Prepare the Flank Steak: Place the flank steak in a mixing bowl and toss it with the cornstarch until every piece is evenly coated. This step helps thicken the sauce during cooking and adds a nice texture to the meat.
  2. Assemble in Slow Cooker: Transfer the coated flank steak to your slow cooker. Add toasted sesame oil, minced garlic, minced ginger, low sodium soy sauce, brown sugar, and water over the meat. Stir gently to ensure all pieces are evenly coated with the sauce.
  3. Cook the Beef: Cover the slow cooker with the lid. Cook on HIGH for 2 to 3 hours or on LOW for 4 to 5 hours, until the beef is tender and infused with the rich flavors of the sauce.
  4. Add Green Onions: Just before serving, stir in the chopped green onions to add a fresh, crisp contrast to the savory beef.

Notes

  • Use thin slices of flank steak cut against the grain to ensure tenderness.
  • Coat the beef in cornstarch before cooking for a thicker, glossy sauce.
  • Use low sodium soy sauce to control the saltiness and balance the dish’s flavor.
  • Feel free to adjust brown sugar to your desired sweetness level.
  • Let the dish rest for a few minutes after cooking to allow flavors to meld beautifully.
  • For gluten-free option, substitute soy sauce and cornstarch with gluten-free versions.
  • Optional: sprinkle toasted sesame seeds on top for additional flavor and garnish.

Keywords: Mongolian Beef, Slow Cooker Beef, Asian Slow Cooker Recipe, Easy Dinner, Flank Steak Recipe, Crockpot Beef