Easy Slow Cooker Mongolian Beef: Tender, Flavorful & Fuss-Free!

A close-up of Easy Slow Cooker Mongolian Beef served over rice, garnished with green onions.

Craving that irresistible sweet and savory flavor of Mongolian Beef but want to avoid takeout? You've come to the right place! This Easy Slow Cooker Mongolian Beef recipe delivers incredibly tender flank steak enveloped in a rich, glossy sauce, all with minimal effort. It's the ultimate set-it-and-forget-it meal that promises to become a family favorite.

There's nothing quite like walking into your home at the end of a long day to the aroma of a delicious dinner cooking itself. Our slow cooker version of this classic Chinese-American dish means less time slaving over a hot stove and more time enjoying a restaurant-quality meal right in your own kitchen.

Why You'll Love This Slow Cooker Mongolian Beef

  • Effortless Prep: Most of the work is in the initial slicing and sauce mixing. Your slow cooker handles the rest!
  • Incredibly Tender Beef: Slow cooking ensures the flank steak becomes melt-in-your-mouth tender, soaking up all the delicious flavors.
  • Sweet & Savory Perfection: The balance of brown sugar and soy sauce creates that iconic, addictive Mongolian beef flavor profile.
  • Versatile Meal: Perfect over rice, noodles, or with a side of steamed vegetables.

Key Ingredients for Flavor & Texture

While the full ingredient list is in the recipe card below, let's highlight a few stars that make this dish shine:

  • Flank Steak: The ideal cut for this recipe, it cooks up tender and slices beautifully. Remember to slice against the grain for maximum tenderness. For easy, precise slicing, a quality chef's knife makes all the difference!
  • Cornstarch: This is key! It not only helps to thicken the sauce but also coats the beef, locking in moisture and ensuring it stays incredibly tender during the long cooking process.
  • Soy Sauce & Brown Sugar: The dynamic duo that forms the foundation of that signature sweet and savory Mongolian sauce. Low sodium soy sauce allows you to control the saltiness better.
  • Garlic & Ginger: These aromatics provide the essential pungent and spicy undertones that give the sauce its depth. Fresh is always best!

How to Make Easy Slow Cooker Mongolian Beef

The beauty of this recipe lies in its simplicity. Here's a quick overview of the process:

  1. Prepare the Beef: Thinly slice your flank steak against the grain and toss it with cornstarch. This coating is crucial for tender beef and a thickened sauce.
  2. Whip Up the Sauce: In a separate bowl, whisk together soy sauce, brown sugar, water, sesame oil, minced garlic, and minced ginger.
  3. Combine & Cook: Place the coated beef in your slow cooker, pour the sauce over it, and set it to cook. Let time and heat work their magic!
  4. Garnish & Serve: Once the beef is fall-apart tender, stir well, garnish with fresh green onions, and serve immediately with your favorite sides.

Tips for Success

  • Slice Against the Grain: This is paramount for tender beef. Look at the muscle fibers; you want to cut perpendicular to them.
  • Don't Skip the Cornstarch: It's essential for both tenderizing the beef and thickening the sauce to a luscious consistency.
  • Adjust Sweetness: Taste the sauce before adding the beef. If you prefer it sweeter, add a touch more brown sugar; if you like it less sweet, reduce slightly.
  • Add Veggies: For a complete meal, consider adding broccoli florets or sliced carrots during the last hour of cooking.

Serving Suggestions

This versatile dish is fantastic with a variety of accompaniments:

  • Steamed Rice: Classic white or brown rice is always a winner for soaking up that amazing sauce.
  • Noodles: Egg noodles or lo mein noodles make for a hearty meal.
  • Low-Carb Options: Serve over cauliflower rice, zucchini noodles, or a bed of sautéed spinach for a lighter alternative.
  • Steamed Vegetables: Broccoli, snap peas, or green beans are excellent choices to add some freshness and crunch.

Get ready to impress your family and friends with this incredible Easy Slow Cooker Mongolian Beef. It's proof that homemade can be just as delicious, if not more so, than your favorite takeout, and it's certainly a whole lot easier on your wallet!

Happy cooking!

FAQs

Can I use a different cut of beef for Slow Cooker Mongolian Beef?

While flank steak is traditional, you can use other cuts like sirloin, chuck roast (cut into strips), or even stew beef. Adjust cooking time as needed to ensure tenderness.

What should I serve with Slow Cooker Mongolian Beef?

This dish pairs wonderfully with steamed white or brown rice, quinoa, or noodles. For a healthier option, serve it with steamed broccoli, sautu00e9ed green beans, or a side salad.

Can I freeze leftover Mongolian Beef?

Yes, leftover Mongolian Beef freezes well. Store it in an airtight container for up to 2-3 months. Thaw in the refrigerator overnight and reheat gently on the stovetop or in the microwave.

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A close-up of Easy Slow Cooker Mongolian Beef served over rice, garnished with green onions.

Easy Slow Cooker Mongolian Beef


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  • Total Time: 3 hours 15 minutes
  • Yield: 4-6 servings 1x
  • Diet: High Protein

Description

A deliciously tender flank steak recipe coated in a rich, savory, and slightly sweet sauce, cooked to perfection in your slow cooker for an effortless weeknight meal.


Ingredients

Scale

1 1/2 pounds flank steak, thinly sliced against the grain
1/4 cup cornstarch
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, packed
1/2 cup water
1/2 cup green onions, sliced, for garnish


Instructions

Step 1: Pat the thinly sliced flank steak dry with paper towels. In a large bowl, toss the steak with cornstarch until evenly coated. This step is crucial for achieving a tender texture and helping to thicken the sauce.
Step 2: In a separate medium bowl, whisk together the toasted sesame oil, minced garlic, minced ginger, low sodium soy sauce, brown sugar, and water until the sugar is dissolved and the sauce is well combined.
Step 3: Place the cornstarch-coated flank steak into the slow cooker. Pour the prepared sauce evenly over the beef.
Step 4: Cover the slow cooker and cook on low for 6-8 hours or on high for 3-4 hours, or until the beef is incredibly tender and easily shredded with a fork.
Step 5: Once cooked, stir the beef and sauce well. The sauce will have thickened considerably. Serve immediately over rice or noodles, garnished generously with sliced green onions.

Notes

For best results, slice the flank steak when it's partially frozen – it makes it much easier to get those thin, even strips. You can also add some vegetables like broccoli florets or sliced carrots during the last hour of cooking.

  • Prep Time: 15 minutes
  • Cook Time: 3-4 hours (on high) or 6-8 hours (on low)
  • Category: Main Course
  • Method: Slow Cooking
  • Cuisine: Chinese-American

Nutrition

  • Serving Size: 1 cup
  • Calories: 380 kcal
  • Sugar: 20g
  • Sodium: 750mg
  • Fat: 18g
  • Saturated Fat: 7g
  • Unsaturated Fat: 9g
  • Trans Fat: 0g
  • Carbohydrates: 35g
  • Fiber: 2g
  • Protein: 25g
  • Cholesterol: 75mg

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