There’s something truly magical about the comforting aroma of Slow Cooker Mongolian Beef wafting through your home, quickly whisking you away to an Asian bistro where every bite bursts with flavor. This delightful dish, featuring tender flank steak mingled with garlic and ginger, is a lifesaver for busy nights or festive gatherings, offering a rich, sweet-savory experience without the hours of prep. Best of all, it’s remarkably simple; just toss the ingredients in your slow cooker, and let it work its magic! With the flexibility to use gluten-free soy sauce and the option to sneak in veggies, this recipe is all about making homemade meals not just easy but enjoyable. Are you ready to dive into a bowl of perfection that brings restaurant vibes right to your kitchen?

Why Choose Slow Cooker Mongolian Beef?
Flavorful and satisfying, this dish showcases a rich blend of sweet and savory notes that transports your taste buds straight to Asia. Effortless preparation means you can achieve a gourmet meal with just a few minutes of hand-on time—perfect for busy lifestyles. Versatile options allow you to customize it with veggies, making it a healthier choice. Plus, the leftovers are just as delicious, saving you time for future meals. If you’re a fan of satisfying dishes like Beef Pasta Comforting or crave wholesome meals reminiscent of Chinese Beef Broccoli, this recipe is sure to become a favorite in your kitchen.
Slow Cooker Mongolian Beef Ingredients
• Get ready to whip up this delicious dish with simple ingredients!
For the Beef
- Flank Steak – Provides tenderness; for a budget-friendly option, substitute with sirloin or thinly sliced chuck roast.
For the Sauce
- Soy Sauce – Adds essential umami; remember to use gluten-free soy sauce if needed!
- Brown Sugar – Balances the savory flavors; coconut sugar or honey can also work well as substitutes.
- Garlic – Enhances depth of flavor; fresh garlic is best, but garlic powder is an acceptable stand-in.
- Ginger – Infuses a warm, spicy note; opt for fresh ginger for the best flavor, with ground ginger as a secondary option.
- Cornstarch – Thicken the sauce for a luscious texture; can be omitted for low-carb diets.
- Beef Broth or Water – Ensures moisture during cooking; chicken broth is a great alternative.
Feel free to explore your flavor palate with these ingredients, and enjoy every moment spent creating your very own Slow Cooker Mongolian Beef!
Step‑by‑Step Instructions for Slow Cooker Mongolian Beef
Step 1: Prepare the Flank Steak
Start by trimming any excess fat from the flank steak and slicing it thinly against the grain. This will ensure that the meat remains tender and melts in your mouth. Aim for slices about a quarter-inch thick. Once sliced, set the beef aside while you mix the sauce, as this will allow it to absorb more flavor during cooking.
Step 2: Make the Sauce
In a medium bowl, whisk together the soy sauce, brown sugar, minced garlic, grated ginger, and cornstarch until smooth. This luscious mixture will create that delicious sweet-savory glaze you associate with your favorite Slow Cooker Mongolian Beef. Make sure the cornstarch is fully dissolved to avoid any lumps, ensuring a silky sauce.
Step 3: Combine Beef and Sauce in Slow Cooker
Place the sliced flank steak into the slow cooker, making sure to distribute it evenly. Pour the prepared sauce over the beef, ensuring every piece is thoroughly coated. Use a spatula or wooden spoon to gently toss the beef in the sauce, creating a fragrant base for your mouthwatering Slow Cooker Mongolian Beef.
Step 4: Cook the Beef
Cover the slow cooker with its lid and set it to cook on low for about 3 hours. During this time, the flavors will meld beautifully, and the beef will become fork-tender. Keep an eye on the clock; you want to ensure the meat doesn’t overcook, which would detract from its tenderness and juicy texture.
Step 5: Finalize and Serve
Once the cooking time is up, check the beef for tenderness, and give it a gentle stir to mix in the sauce. You’ll notice it’s become thick and glossy. Serve your Slow Cooker Mongolian Beef over a bed of cooked rice or noodles, garnishing with sliced green onions or sesame seeds for an added burst of flavor and visual appeal.

Expert Tips for Slow Cooker Mongolian Beef
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Slice Against the Grain: Ensure the flank steak is sliced thinly against the grain to maintain tenderness. Thick slices can result in chewy meat that’s less enjoyable.
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Soy Sauce Substitutions: For a gluten-free option, always choose a gluten-free soy sauce. This small switch allows everyone to enjoy your Slow Cooker Mongolian Beef.
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Watch the Cooking Time: Set a timer to avoid overcooking. Check the meat for tenderness around the 3-hour mark; it should be fork-tender but not dry.
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Add Heat: If you enjoy a spicy kick, feel free to add red pepper flakes or chili paste to the sauce. This adds a delightful layer of flavor to your dish.
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Incorporate Veggies: For a nutritious boost, consider adding bell peppers, broccoli, or carrots into the slow cooker. They’ll cook beautifully alongside the beef without overwhelming the flavor.
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Thickening the Sauce: If you prefer a thicker sauce, feel free to mix an additional teaspoon of cornstarch in some water and stir it into the slow cooker during the last 30 minutes of cooking.
How to Store and Freeze Slow Cooker Mongolian Beef
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Fridge: Store leftovers in an airtight container for up to 3-4 days to maintain flavor and freshness. Always ensure the beef is cooled before sealing for best results.
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Freezer: Freeze the cooled Slow Cooker Mongolian Beef in suitable containers or freezer bags for up to 2-3 months. This method preserves its sweet-savory flavor for future meals.
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Reheating: Thaw overnight in the fridge before reheating. Warm gently on the stovetop or in the microwave until heated through, stirring occasionally for even warmth.
What to Serve with Slow Cooker Mongolian Beef
There’s nothing quite like the delightful combination of flavors that rounds out a cozy meal with friends and family.
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Steamed Jasmine Rice: The fluffy grains soak up the savory sauce, creating the perfect comforting base.
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Garlic Noodles: A buttery, garlicky noodle dish brings an extra layer of flavor and texture to your meal experience.
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Stir-Fried Vegetables: Bright and crunchy veggies like bell peppers and snap peas add a pop of color and nutrition. Add some zing with a splash of soy sauce.
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Asian Cucumber Salad: Cool, crisp cucumbers with a tangy vinaigrette offer a refreshing contrast to the rich flavors of the beef. It’s an irresistible palate cleanser.
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Lettuce Wraps: For a fun twist, serve the beef in fresh lettuce leaves with a sprinkle of crunchy peanuts, creating a delightful hand-held treat.
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Sesame Green Beans: Lightly sautéed in sesame oil, these can complement the beef while adding a lovely nutty flavor to the plate.
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Chilled Sake or Riesling: A smooth glass of sake or a sweet Riesling pairs beautifully with the sweet-savory notes of Mongolian beef, enhancing your dining experience.
Indulging in these pairings will elevate your dining experience while making your Slow Cooker Mongolian Beef shine even brighter!
Slow Cooker Mongolian Beef Variations
Feel free to customize your Slow Cooker Mongolian Beef with these delightful twists that cater to different palates and dietary needs!
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Vegetable Boost: Add chopped bell peppers or broccoli for a nourishing crunch. Not only does this enhance the dish’s color, but it also brings additional vitamins to your meal.
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Chicken Alternative: Swap flank steak for chicken breast or thighs. This adjustment still delivers a satisfying texture while creating a lighter option for those looking to mix it up.
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Sweetness Adjust: Modify the amount of brown sugar for a sweeter or less sweet dish. Play with flavors until it matches your ideal taste, making this dish truly your own.
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Spicy Kick: Introduce red pepper flakes or a dash of chili paste into the sauce for an unexpected heat. This adds depth and excitement to your plated dish, making it even more memorable.
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Gluten-Free Twist: Ensure that every ingredient, especially your soy sauce, is gluten-free. This allows everyone to indulge in the same fabulous flavor without concern.
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Sauce Thickness: For a saucier finish, mix extra cornstarch with water and stir it into the slow cooker towards the end. This is perfect for soaking up with rice or noodles.
If you’re looking for more comforting ideas, consider pairing these variations with comforting dishes like Ground Beef Dumplings or enjoy the robust flavors of Chinese Beef Broccoli. Each adjustment invites your creativity in the kitchen while favoring the heartwarming experience of home-cooked meals!
Make Ahead Options
These Slow Cooker Mongolian Beef preparations are perfect for busy cooks looking to save time! You can slice the flank steak and prepare the sauce up to 24 hours in advance; simply store them separately in airtight containers in the refrigerator. For best results, make sure to coat the beef slices in a bit of sauce before refrigerating to prevent browning. When you’re ready to enjoy this flavorful dish, just combine the beef and sauce in the slow cooker and cook on low for about 3 hours. This way, you’ll have a delicious homemade meal with minimal effort—ideal for those hectic weeknights!

Slow Cooker Mongolian Beef Recipe FAQs
What type of flank steak should I use for Slow Cooker Mongolian Beef?
For the best tenderness, use flank steak, but you can also substitute with sirloin or thinly sliced chuck roast if you prefer a more budget-friendly option. Just ensure that any substitution is sliced thinly against the grain to maintain that melt-in-your-mouth quality.
How should I store leftover Slow Cooker Mongolian Beef?
Store any leftovers in an airtight container in the refrigerator for up to 3-4 days. It’s essential to let the beef cool before sealing it to preserve the flavor and freshness, so aim to chill it quickly after serving.
Can I freeze Slow Cooker Mongolian Beef?
Absolutely! To freeze, allow the dish to cool completely, then transfer it to suitable freezer containers or bags. Label the containers with the date and freeze for up to 2-3 months. When you’re ready to enjoy it, thaw overnight in the fridge before reheating.
What if I want to add vegetables to my Slow Cooker Mongolian Beef?
Incorporating vegetables is a great idea! You can add bell peppers, broccoli, or carrots directly to the slow cooker during the last 30 minutes of cooking. This will allow them to retain some crunch while infusing flavor into the beef, creating a more balanced meal.
Are there any dietary considerations I should keep in mind?
Yes! For those needing gluten-free options, simply use gluten-free soy sauce in the recipe. If accommodating allergies, be mindful of substituting any ingredients that might cause reactions, such as soy sauce with alternatives like coconut aminos or tamari for a gluten-free option.

Slow Cooker Mongolian Beef
Ingredients
Equipment
Method
- Trim excess fat from the flank steak and slice it thinly against the grain, about a quarter-inch thick.
- In a medium bowl, whisk together the soy sauce, brown sugar, minced garlic, grated ginger, and cornstarch until smooth.
- Place the sliced flank steak in the slow cooker and pour the sauce over the beef, ensuring it is thoroughly coated.
- Cover and cook on low for about 3 hours, until fork-tender.
- Once cooking is complete, stir gently to mix in the sauce and serve over rice or noodles.

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