Slow Cooker Mongolian Beef

Looking for a hassle-free yet delicious dinner option? Look no further than this Slow Cooker Mongolian Beef recipe. With tender slices of flank steak bathed in a savory-sweet sauce infused with garlic, ginger, and green onions, this dish is a delightful fusion of flavors that’s sure to satisfy your taste buds. Plus, it’s all made effortlessly in your trusty slow cooker, allowing you to enjoy a homemade meal without the stress of extensive cooking. Let’s dive into the recipe and discover how to create this irresistible dish with minimal effort.


  1. Flank Steak: Thinly sliced flank steak serves as the star ingredient, delivering tender, juicy bites with every forkful.
  2. Toasted Sesame Oil, Garlic, and Ginger: These aromatic ingredients add depth and complexity to the sauce, infusing it with irresistible flavors.
  3. Low Sodium Soy Sauce and Brown Sugar: The combination of soy sauce and brown sugar creates a perfect balance of salty and sweet notes, enhancing the overall taste of the dish.
  4. Cornstarch: Coating the flank steak with cornstarch helps to tenderize the meat and thicken the sauce as it cooks.
  5. Green Onions: Fresh green onions lend a pop of color and a subtle onion flavor, rounding out the dish beautifully.

Directions :

  1. Preparation: Start by thinly slicing the flank steak and coating it evenly with cornstarch. This step helps to tenderize the meat and ensures a velvety texture.
  2. Sauce Creation: Mix together the toasted sesame oil, minced garlic, minced ginger, soy sauce, brown sugar, and water to create the flavorful sauce that will envelop the beef as it cooks.
  3. Slow Cooking: Place the coated flank steak in the slow cooker and pour the sauce over it, ensuring that the meat is well-coated. Cook on HIGH for 2-3 hours or LOW for 4-5 hours until the beef is tender and the sauce has thickened to perfection.
  4. Finishing Touch: Stir in the chopped green onions just before serving to add a fresh burst of flavor and vibrant color to the dish. Serve the Mongolian beef over cooked rice or noodles for a complete and satisfying meal.

Serving and Storage Tips:

  • Serve the Slow Cooker Mongolian Beef hot over a bed of fluffy rice or noodles for a hearty and fulfilling meal.
  • Garnish with additional sliced green onions or toasted sesame seeds for an extra touch of flavor and visual appeal.
  • Store any leftovers in an airtight container in the refrigerator for up to 3-4 days. Reheat gently in the microwave or on the stovetop before serving.
  • This dish also freezes well. Simply transfer cooled leftovers to freezer-safe containers or resealable bags and freeze for up to 2-3 months. Thaw overnight in the refrigerator before reheating.

Serving and Storage Tips:

  1. Serve Fresh and Hot: Enjoy your Slow Cooker Mongolian Beef fresh and hot for the best flavor and texture. Serve it over a bed of steamed rice or noodles to soak up the delicious sauce and complement the tender beef.
  2. Garnish for Extra Flavor: Enhance the presentation and flavor of your dish by garnishing it with additional sliced green onions or a sprinkle of toasted sesame seeds. These simple additions add a burst of freshness and visual appeal to your meal.
  3. Store Properly: If you have leftovers, store them in an airtight container in the refrigerator promptly after serving. Proper storage helps maintain the quality and safety of the dish, ensuring it stays fresh for later enjoyment.
  4. Reheat with Care: When reheating leftovers, do so gently to prevent the beef from becoming tough or overcooked. Use the microwave for quick reheating or warm the dish on the stovetop over low heat, stirring occasionally until heated through.
  5. Freeze for Future Meals: Slow Cooker Mongolian Beef freezes exceptionally well, making it perfect for meal prep or batch cooking. Allow the dish to cool completely before transferring it to freezer-safe containers or resealable bags. Label with the date and contents, then store in the freezer for up to 2-3 months.
  6. Thaw Safely: When ready to enjoy frozen leftovers, thaw them overnight in the refrigerator to ensure even and safe thawing. Avoid thawing at room temperature, as this can lead to uneven thawing and potential food safety risks.
  7. Reheat from Frozen: If you’re short on time, you can reheat frozen Mongolian beef directly from the freezer. Place the frozen dish in a microwave-safe container and heat on a low setting, stirring occasionally, until thoroughly heated. Alternatively, thaw overnight in the refrigerator before reheating using the microwave or stovetop method.
  8. Customize Your Meal: Get creative with your serving options by pairing Slow Cooker Mongolian Beef with your favorite side dishes. Try serving it alongside steamed vegetables, stir-fried greens, or a crisp salad for a well-rounded and satisfying meal.
  9. Portion Control: If you’re meal prepping or planning for smaller servings, portion out individual servings of Mongolian beef into separate containers before storing. This makes it easier to grab a quick and satisfying meal on busy days without the need for additional preparation.
  10. Enjoy Responsibly: Slow Cooker Mongolian Beef is a delicious and indulgent dish, but moderation is key. Enjoy it as part of a balanced diet, incorporating plenty of fruits, vegetables, and whole grains to maintain overall health and well-being.

By following these serving and storage tips, you can ensure that your Slow Cooker Mongolian Beef remains fresh, flavorful, and enjoyable for every meal. Whether you’re cooking for yourself or sharing with loved ones, this delicious dish is sure to be a hit every time!


  1. Vegetarian Version: Swap the flank steak for sliced mushrooms or tofu for a meat-free alternative. Adjust the cooking time accordingly to ensure the vegetables are cooked to perfection.
  2. Chicken Substitute: Replace the flank steak with thinly sliced chicken breast or thighs for a lighter option. Follow the same cooking instructions, adjusting the cooking time as needed.
  3. Spicy Kick: Add a touch of heat to your Mongolian beef by incorporating red pepper flakes or sriracha sauce into the sauce mixture. Adjust the amount to suit your spice preference.
  4. Asian-Inspired Twist: Enhance the flavor profile by incorporating traditional Asian ingredients such as hoisin sauce, rice vinegar, or sesame seeds into the sauce mixture. Experiment with different combinations to create your unique twist on this classic dish.
  5. Vegetable Medley: Amp up the nutritional value of your dish by adding your favorite vegetables to the slow cooker along with the beef. Bell peppers, broccoli, carrots, and snap peas are all excellent options that pair well with the savory sauce.
  6. Teriyaki Style: Transform your Mongolian beef into a teriyaki-inspired dish by substituting soy sauce with teriyaki sauce and adding a splash of pineapple juice for a hint of sweetness. Garnish with sliced green onions and sesame seeds for an authentic touch.
  7. Citrus Infusion: Brighten up the flavors of your dish by adding freshly squeezed orange or pineapple juice to the sauce mixture. The citrusy notes will add a refreshing twist to the savory-sweet sauce.
  8. Coconut Curry Variation: Give your Mongolian beef an exotic flair by incorporating coconut milk and curry paste into the sauce mixture. This variation offers a creamy texture and a hint of spice that pairs beautifully with the tender beef.
  9. Sesame Ginger Twist: Infuse your dish with the bold flavors of sesame oil and ginger by incorporating these ingredients into the sauce mixture. The aromatic combination adds depth and complexity to the dish, elevating it to new heights.
  10. Hoisin Glaze: Create a rich and flavorful glaze by combining hoisin sauce, soy sauce, honey, and garlic. Brush the glaze over the cooked beef during the last few minutes of cooking for a deliciously sticky and sweet finish.


  1. Can I use a different cut of beef for this recipe?
    • While flank steak is traditionally used in Mongolian beef, you can substitute it with other cuts such as sirloin or skirt steak. Just ensure to slice the meat thinly for optimal tenderness.
  2. Can I make this recipe in advance?
    • Yes, you can prepare the ingredients ahead of time and store them in the refrigerator until ready to cook. Simply combine the beef and sauce mixture in the slow cooker when you’re ready to start cooking.
  3. How can I make this dish gluten-free?
    • To make this recipe gluten-free, use tamari or coconut aminos in place of soy sauce and ensure that all other ingredients are gluten-free certified.
  4. Can I adjust the sweetness of the sauce?
    • Yes, feel free to adjust the amount of brown sugar in the sauce to suit your taste preferences. You can also substitute brown sugar with honey or maple syrup for a natural sweetener alternative.

With its tender beef, flavorful sauce, and effortless preparation, Slow Cooker Mongolian Beef is a must-try recipe for busy weeknights or lazy weekends. Let your slow cooker do the heavy lifting while you enjoy the delightful aromas wafting through your kitchen. Whether you’re cooking for yourself or feeding a crowd, this dish is sure to become a new favorite in your recipe repertoire. Try it today and experience the convenience and deliciousness of homemade slow-cooked goodness!