Easy Slow Cooker Mongolian Beef

Craving the rich, sweet, and savory flavors of your favorite Chinese takeout without the fuss? Look no further! This Slow Cooker Mongolian Beef recipe delivers an incredibly tender, fork-apart steak bathed in a luscious garlic, ginger, and savory sauce with a hint of red chili peppers. It’s the ultimate “dump-and-go” family dinner, perfect for busy weeknights when you want maximum flavor with minimal effort.

Imagine succulent pieces of beef, slow-cooked to perfection, absorbing a delightful symphony of Asian-inspired tastes. This dish transforms simple ingredients into an extraordinary meal that rivals any restaurant creation, all made affordably and conveniently in your own kitchen.

The secret to achieving exceptionally flavorful and tender Mongolian beef in a slow cooker lies in a simple technique: coating the beef in cornstarch. This small step works wonders by helping to tenderize the meat while it slow cooks, creating that desirable melt-in-your-mouth texture without the need for an initial searing. By allowing the beef to simmer for 6 to 8 hours on low, you unlock incredible depth of flavor and tenderness, making for a hands-off cooking experience that yields maximum reward.

While I adore all my slow cooker creations, a few stand out as absolute favorites. Beyond this incredible Mongolian Beef, you might also love my irresistible Crack Chicken sliders, the delightful Sweet and Sour meatballs, and for a comforting dessert, my warm and sweet crockpot Peach Cobbler. Each offers the same convenience and delicious results that make slow cooking such a beloved method.

Why Is It Called Mongolian Beef? Unraveling the Culinary Mystery

Despite its evocative name, Mongolian Beef actually has very little to do with traditional Mongolian cuisine. This popular dish, a staple in Chinese-American restaurants around the globe, is a testament to culinary adaptation and marketing ingenuity. It originated in Taiwan, not Mongolia, during a time when restaurateurs sought to create dishes that would appeal to local tastes while still conveying an exotic “Asian” flair.

The “Mongolian” in its name likely refers to the style of cooking, specifically “Mongolian Barbecue” restaurants that gained popularity, where diners would select raw meats and vegetables to be cooked quickly on large, round griddles. While traditional Mongolian cuisine often features dairy products, mutton, and wild game, the Taiwanese version of Mongolian Beef skillfully incorporated common Chinese ingredients like soy sauce, garlic, and ginger, creating a dish that quickly became a crowd-pleaser. The original Mongolian Beef recipe typically used thinly sliced beef, often flank steak or sirloin, rapidly cooked over high heat and coated in a rich, sweet and savory sauce. Our slow cooker adaptation captures all these beloved flavors with the added benefit of hands-off convenience and superior tenderness.

Why You’ll Absolutely Love This Slow Cooker Mongolian Beef Recipe

This Slow Cooker Mongolian Beef is more than just a meal; it’s a game-changer for your dinner routine. Here are compelling reasons why it’s guaranteed to become a new family favorite:

• A Guaranteed Family Favorite: This dish is brimming with bold, irresistible flavors and packed with satisfying protein. It’s a meal that universally pleases palates, making even the pickiest eaters eager for dinner. The tender beef and rich sauce create a comforting experience that keeps everyone coming back for more.
• Delicious and Budget-Friendly: Enjoy gourmet Chinese-inspired cuisine without the hefty restaurant bill. Our recipe allows you to use leaner, more affordable cuts of beef, which become incredibly tender through the magic of slow cooking. This makes it a smart and economical choice for a delicious dinner tonight.
• Perfect for Meal Prep: If you’re a fan of meal planning, this recipe is an absolute must-add to your weekly rotation. Prepare a large batch and enjoy healthy, flavorful meals throughout the week. You can even freeze portions of cooked beef and rice for months, ensuring you always have a convenient and tasty option on hand for those extra busy days.
• Healthier Than Takeout: Take control of your ingredients and enjoy a meal that’s far healthier than any restaurant equivalent. By making it at home, you know exactly what goes into your food, avoiding excessive sodium, unhealthy oils, and hidden additives. It’s one of our favorite slow cooker meals for both taste and peace of mind.

Key Ingredients for Authentic Slow Cooker Mongolian Beef

For exact quantities and detailed instructions, be sure to consult the comprehensive recipe card at the bottom of the page. Here’s a closer look at the stars of this sensational dish:

• Flank Steak: Sliced into thin strips against the grain, flank steak is an excellent choice. While it’s a leaner cut, the slow cooking method breaks down its fibers beautifully, resulting in wonderfully soft, juicy, and flavorful beef that’s incredibly tender.
• Cornstarch: This unassuming ingredient is critical for achieving ultimate tenderness without any pre-cooking. When tossed with the beef, it creates a protective coating that helps tenderize even leaner cuts and thickens the sauce to that perfect, clingy consistency.
• Aromatics (Onion, Garlic Cloves, Fresh Ginger): These three ingredients are the backbone of flavor in Chinese stir-fries and our Mongolian Beef. Onion provides a sweet, foundational base, while fresh garlic and ginger infuse the dish with their pungent, warm, and distinctly Asian aromas and tastes, elevating the overall complexity.
• Toasted Sesame Oil (or regular olive oil): Toasted sesame oil is a flavor powerhouse, adding a deep, nutty, and distinctly Asian essence. If unavailable, regular olive oil can be used, though the toasted sesame oil truly enhances the authentic taste.
• Low-Sodium Soy Sauce: Essential for that signature savory umami depth, low-sodium soy sauce allows you to control the saltiness of the dish, ensuring it’s perfectly balanced without being overpowering. This recipe often doesn’t require any additional salt!
• Brown Sugar: Beyond adding a delightful caramel sweetness that balances the soy sauce, brown sugar also contributes to the meat’s tenderness and helps to thicken the sauce, giving it a beautiful sheen and rich body. Both light or dark brown sugar work well.
• Water (or Broth): This forms the base of our flavorful sauce. While beef broth or stock will add an extra layer of savory depth, plain water works perfectly fine if you don’t have broth on hand.
• Black Pepper: A touch of black pepper adds a subtle warmth and balances the other assertive flavors in the sauce.
• Green Onions: Sliced green onions provide a fresh, slightly pungent flavor and a vibrant pop of color. They are incorporated into the dish and also make a beautiful garnish, adding a fresh contrast to the rich beef.
• Dried Red Chili Peppers (optional): For those who enjoy a bit of heat, dried red chili peppers offer a delightful spice. Adjust the quantity to your preference, or omit for a milder dish.
• Sesame Seeds (optional): Both black and white sesame seeds make for an attractive and textural garnish, adding a delicate crunch and nutty flavor to the finished dish.

Essential Kitchen Equipment for Your Slow Cooker Mongolian Beef

To prepare this incredibly easy Slow Cooker Mongolian Beef, you’ll need just a few basic kitchen tools:

• 7-qt Crock Pot: The star of the show! A 7-quart slow cooker is ideal for accommodating all the ingredients and allowing for even cooking.
• Mixing Bowl: A medium-sized mixing bowl is handy for whisking together the flavorful sauce.
• Large Skillet (Optional): If you choose to sear the meat first (though not necessary for this recipe, as discussed), a large skillet would be used for that step.
• Air-Tight Container (or a Freezer Bag): Essential for storing any delicious leftovers, ensuring they stay fresh and flavorful for days to come.

How To Make Easy Slow Cooker Mongolian Beef: A Step-by-Step Guide

This recipe is designed for maximum ease and minimal effort, making it the perfect “dump-and-go” meal. Follow these simple steps to create a truly unforgettable Slow Cooker Mongolian Beef:

Step 1: Prepare and Coat the Beef

1. Begin by preparing your slow cooker. Lightly spray the inside insert with cooking oil to ensure the ingredients don’t stick during the long cooking process.
2. Carefully add the thinly sliced flank steak strips to the prepared slow cooker. Sprinkle the cornstarch over the beef.
3. Toss the beef and cornstarch together thoroughly until each piece of steak is evenly coated. This crucial step helps tenderize the meat and contributes to the sauce’s luxurious thickness.
4. Evenly distribute the sliced onions over the coated flank steak in the slow cooker.

Step 2: Whisk and Pour the Flavorful Sauce

In a separate small bowl, combine the minced garlic, fresh minced ginger, toasted sesame oil, low-sodium soy sauce, brown sugar, water (or broth), and black pepper. Whisk these ingredients together until they are fully combined and the brown sugar has dissolved. Once the sauce is well-mixed, pour it evenly over the beef and onions in the slow cooker, ensuring all ingredients are generously coated.

Step 3: Slow Cook to Perfection and Serve

1. Secure the lid on your slow cooker. Cook the Mongolian Beef on the LOW setting for 6-8 hours, or if you’re in a hurry, you can cook it on HIGH for 3-4 hours. The goal is for the beef to be exceptionally tender and thoroughly cooked through, easily shreddable with a fork.
2. About 15-20 minutes before serving, stir in the fresh green onions and, if using, the dried red chili peppers. This allows them to soften slightly while retaining their vibrant color and fresh flavor.
3. Before bringing this magnificent dish to the table, garnish generously with sesame seeds. Serve hot and enjoy!

Perfect Serving Ideas for Your Mongolian Beef Dinner

This Slow Cooker Mongolian Beef is incredibly versatile and pairs wonderfully with a variety of sides. For a complete and satisfying meal, traditionally it’s served over a bed of fluffy steamed white rice or your favorite noodles. However, don’t hesitate to get creative with these delicious pairings:

• Steamed Rice: The classic choice. White, brown, or jasmine rice provides the perfect neutral canvas to soak up all the rich, sweet, and savory sauce.
• Noodles: Egg noodles, lo mein noodles, or even rice vermicelli noodles are fantastic for tossing with the tender beef and sauce.
• Roasted Broccoli: A simple yet flavorful green vegetable that adds a pleasant crunch and earthy contrast to the rich beef.
• Green Beans: Steamed, roasted, or lightly stir-fried, green beans offer a fresh and vibrant side.
• Asparagus: Lightly roasted asparagus spears provide a delicate flavor and tender-crisp texture.
• Stir-Fry Vegetables: A medley of your favorite stir-fried vegetables like bell peppers, snap peas, carrots, and mushrooms can add extra nutrition and texture.
• Egg Rolls: For an authentic takeout experience, serve with crispy homemade or store-bought egg rolls.
• Cauliflower Rice: A low-carb alternative for those looking to reduce their carbohydrate intake, offering a similar texture to traditional rice.

Storing and Reheating Your Delicious Mongolian Beef Leftovers

One of the many benefits of this Slow Cooker Mongolian Beef recipe is how well it stores, making it fantastic for meal prep or enjoying convenient leftovers throughout the week.

Refrigerate: Any leftover Mongolian Beef can be stored in an airtight container in the refrigerator for up to 4 days. Ensure it cools completely before sealing and storing.

Freeze: For longer storage, this dish freezes beautifully. Place cooled leftovers in a freezer-safe airtight container or a heavy-duty freezer bag for up to 4 months. To prevent freezer burn, try to remove as much air as possible from the container or bag. When ready to enjoy, thaw the frozen beef overnight in the refrigerator before reheating.

Reheat in the Microwave: For a quick reheat, transfer the desired portion to a microwave-safe dish and heat on high for 2-3 minutes, stirring halfway through, or until it’s hot all the way through. Consider making some fresh steamed rice to serve with it for a fresh touch.

Reheat on the Stove: To reheat on the stovetop, place the beef and sauce in a saucepan over medium-low heat. Add a splash of water or beef broth to thin the sauce slightly, as it may thicken in the fridge. Stir occasionally until heated through. This method is great for maintaining the sauce’s perfect consistency.

Substitutions & Variations: Customizing Your Mongolian Beef

This Slow Cooker Mongolian Beef recipe is incredibly adaptable, allowing for a variety of substitutions and creative additions to suit your preferences or what you have on hand. Don’t be afraid to experiment!

• Meat Alternatives: While flank steak is ideal, this Mongolian beef recipe can also be made with sirloin steak, skirt steak, flat iron steak, or even chuck roast. The key is to slice the meat against the grain and into thin strips, ideally no more than ½-inch thick, to ensure maximum tenderness from the slow cooking process. Avoid using stew meat, as it tends to be too tough for this preparation.
• Boost the Heat: For those who love a spicy kick, there are many ways to enhance the heat. Add the dried chili peppers at the very start of cooking to allow their flavors to meld deeply with the sauce. Alternatively, try incorporating a pinch of ground cayenne pepper, a teaspoon of red pepper flakes, a drizzle of chili crisp oil, chili garlic sauce, or even a squirt of sriracha sauce to taste.
• Add More Veggies: Increase the nutritional value and texture by adding a variety of vegetables. Sliced mushrooms, vibrant red bell peppers, shredded carrots, snow peas, or broccoli florets are all excellent choices. For crispier vegetables, add them during the last hour of cooking, or simply blanch them and stir them in just before serving.
• Extra Sweetness: If you prefer a slightly sweeter sauce, consider adding a tablespoon or two of apricot jam or a bit of honey to the sauce mixture. These additions will lend a lovely, nuanced sweetness and a glossy finish.
• Soy Sauce Alternatives: For a gluten-free option, low-sodium soy sauce can be easily substituted with coconut aminos or tamari, both of which offer similar savory notes without the gluten.
• Umami Depth: For an even richer, more profound sweet and savory umami flavor, consider adding a tablespoon of Hoisin sauce or Oyster sauce to the sauce mixture. These ingredients add incredible depth and complexity to the dish.
• Tenderizing with Acidity: A small splash of red wine vinegar (about a tablespoon) can further tenderize the meat and introduce a subtle acidity that brightens the overall flavor profile. Meat cooked or marinated with just the right amount of vinegar can develop a fantastic depth.
• Flavor Combinations: Experiment with fresh green bell peppers for a slightly bitter contrast, or a mix of chili flakes and a dash of hot sauce for varying levels of heat. Always remember to use low-sodium soy sauce to control the overall saltiness.

**No time for slow cooking? Don’t fret! You can still enjoy these amazing flavors. Load all the ingredients into an Instant Pot and cook on manual for just 10 minutes, followed by a natural pressure release. Fast, easy, and incredibly delicious!

If you loved this incredible slow cooker dinner recipe, you’re in for a treat with these other fantastic slow cooker meals. Explore each link below to discover easy, printable recipes that will quickly become family favorites!

Slow Cooker Shredded Beef

Tender and flavorful Slow Cooker Shredded Beef made with simple ingredients. Perfect for tacos, sandwiches, or meal prep. Easy, juicy, and delicious!

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Slow Cooker Beef Stroganoff

Slow Cooker Beef Stroganoff is sure to please. It’s hearty and filling, making it the perfect weeknight dinner for busy families.

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Slow Cooker Barbecue Ribs

Slow Cooker Barbecue Ribs are the perfect dish to serve for any family gathering, potluck, or party. This twist on a classic recipe makes a moist and tender rib that everyone loves.

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Slow Cooker Stuffed Shells

Calling all pasta lovers! Slow Cooker Stuffed Shells are made in the crockpot and are filled with gooey cheese and savory marinara.

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Slow Cooker Birria Tacos

Tender, flavorful beef slow-cooked in rich, spiced broth and served in crispy, cheesy tortillas—these Slow Cooker Birria Tacos are the ultimate comfort food with bold, authentic flavor.

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More Asian-Inspired Dishes You’ll Love

If you enjoy the vibrant flavors of this Slow Cooker Mongolian Beef, be sure to explore these other delicious Asian-inspired recipes that are perfect for home cooking:

Kung Pao Chicken: A spicy, sweet, and savory stir-fry featuring tender chicken, peanuts, and vegetables.

Panda Express Chow Mein – Copycat Recipe: Recreate your favorite fast-casual noodles right in your kitchen.

Beef with Black Bean Sauce: A deeply savory and umami-rich dish with tender beef and a classic fermented black bean sauce.

Steak Fried Rice: A hearty and flavorful one-pan meal, perfect for using up leftover rice and steak.

Slow Cooker Mongolian Beef

Course: Dinner, Main Course

Servings: 6 servings

Tender, flavorful beef simmered in a rich, sweet-savory sauce—this Slow Cooker Mongolian Beef is an easy, better-than-takeout meal your whole family will love!

Prep Time: 15 mins

Cook Time: 6-8 hrs

Total Time: 6 hrs 15 mins (on low)

Ingredients

• 2 pounds flank steak, sliced into thin strips
• ¼ cup cornstarch
• 1 large onion, sliced
• 4 garlic cloves (3-5 cloves), minced
• 1 teaspoon fresh ginger, minced
• 2 tablespoons toasted sesame oil
• ¾ cup low sodium soy sauce
• ⅓ cup brown sugar
• ½ cup water (or broth)
• ½ teaspoon black pepper
• 6 green onions, cut into 2-inch pieces
• 6 dried red chili peppers (optional, for spice)

For Garnish (Optional)

• Sesame seeds (black or white)

Serving Suggestion

• Serve over white rice or noodles

Instructions

1. Prepare the cooker by spraying the insert with cooking oil to prevent sticking.
2. Add the sliced steak and cornstarch to the cooker – toss to coat until evenly covered.
3. Top the coated flank steak with the sliced onions.
4. Whisk the garlic, ginger, sesame oil, soy sauce, brown sugar, water, and black pepper together in a small bowl until well combined. Pour the mixture over the meat and onions in the slow cooker.
5. Cover and cook on low for 6-8 hours (or on high for 3-4 hours). The beef should be cooked through and fork-tender.
6. Stir in the green onions and dried chilis (if using) during the last 15-20 minutes of cooking.
7. Garnish with sesame seeds before serving.

Notes

This recipe can be made with sirloin steak, skirt steak, flat iron steak, or chuck. Be sure to slice against the grain and cut into thin strips no more than ½-inch thick.

For the best results and truly tender meat, always cook low and slow.

All slow cookers heat differently; adjust cooking times based on your appliance’s performance.

For more texture to the onions, you can add them halfway through the cooking time so they are less tender when serving.

For more kick, add the dried chili peppers at the start of cooking so the flavors meld together. Alternatively, try using ground cayenne pepper, red pepper flakes, chili crisp oil, or even sriracha for added heat.

STORING

Refrigerate any leftovers in an airtight container for up to 4 days. Freeze for up to 4 months; thaw overnight in the fridge before reheating.

Equipment

• 7-qt slow cooker

Nutrition

Serving Size: 1 serving | Calories: 352 kcal | Carbohydrates: 23g | Protein: 36g | Fat: 12g | Saturated Fat: 4g | Cholesterol: 91mg | Sodium: 1236mg | Potassium: 689mg | Fiber: 1g | Sugar: 13g | Vitamin C: 3mg | Calcium: 65mg | Iron: 3mg | Net Carbohydrates: 20g

Nutritional information for the recipe is provided as a courtesy and is approximate. Please double-check with your own dietary calculator for the best accuracy. We at Yummi Haus cannot guarantee the accuracy of the nutritional information given for any recipe on this site.

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