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Slow Cooker Mongolian Beef Recipe

4.4 from 98 reviews

A flavorful and easy Slow Cooker Mongolian Beef recipe featuring tender flank steak simmered in a sweet and savory sauce with garlic, soy sauce, and brown sugar, perfect for a hands-off dinner served over rice and garnished with fresh green onions and sesame seeds.

Ingredients

Scale

Beef and Coating

  • 1 ½ pounds flank steak, thinly sliced
  • ¼ cup cornstarch

Sauce

  • 2 tablespoons olive oil
  • 1 teaspoon garlic, minced
  • ¾ cup soy sauce
  • ¾ cup water
  • ¾ cup brown sugar

Vegetables and Garnish

  • 1 cup carrots, grated
  • Green onions, for garnish
  • Sesame seeds, for garnish

Instructions

  1. Prepare the flank steak: Cut the 1 ½ pounds of flank steak into thin strips. Place the strips into a ziplock bag, add ¼ cup of cornstarch, and shake the bag well to evenly coat all the pieces with cornstarch.
  2. Make the sauce: In a medium-sized bowl, whisk together 2 tablespoons olive oil, 1 teaspoon minced garlic, ¾ cup soy sauce, ¾ cup water, and ¾ cup brown sugar until the sugar is mostly dissolved and the mixture is well combined.
  3. Combine ingredients in slow cooker: Pour the sauce into the slow cooker. Add the 1 cup of grated carrots and the cornstarch-coated flank steak pieces. Stir everything thoroughly to ensure the beef and carrots are well coated with the sauce.
  4. Cook the beef: Cover the slow cooker and cook on high heat for 2 to 3 hours or on low heat for 4 to 5 hours, until the beef is tender and the sauce has thickened nicely.
  5. Serve and garnish: Once cooked, serve the Mongolian beef hot over a bed of rice. Garnish with chopped green onions and a sprinkle of sesame seeds for a fresh and nutty finish.

Notes

  • For extra thickness, you can mix a little more cornstarch with cold water and stir it into the slow cooker about 30 minutes before serving.
  • Using flank steak thinly sliced against the grain helps ensure tenderness.
  • Adjust brown sugar quantity if a less sweet sauce is preferred.
  • If you prefer more vegetables, adding sliced bell peppers or broccoli during the last hour of cooking works well.
  • This recipe pairs perfectly with steamed white rice or fried rice for a complete meal.

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