Slow Cooker Mongolian Beef

Highlighted under: Quick & Tasty Creations

Indulge in the rich flavors of Slow Cooker Mongolian Beef, a dish that's simple to make and perfect for any occasion.

Emma

Created by

Emma

Last updated on 2025-12-02T19:22:03.018Z

This Slow Cooker Mongolian Beef recipe offers a delightful blend of sweet and savory flavors that will leave you craving more. Perfect for busy weeknights, it requires minimal prep time and can be left to cook while you attend to other tasks.

Why You'll Love This Recipe

  • Tender beef that falls apart with a fork
  • Sweet and savory sauce that’s irresistible
  • Effortless preparation with a slow cooker

The Origins of Mongolian Beef

Mongolian Beef is a dish that has captivated taste buds around the world, known for its delectable combination of sweet and savory flavors. Though its name suggests a connection to Mongolia, this dish actually has roots in Chinese-American cuisine. It was popularized in Chinese restaurants across the United States, where chefs creatively adapted traditional recipes to suit local palates.

The use of flank steak is a hallmark of this recipe, providing a tender and flavorful base that's perfect for absorbing the rich sauce. The balance of soy sauce and brown sugar creates a mouthwatering glaze that enhances the beef's natural flavors, making every bite a delightful experience.

While many variations exist, the essence of Mongolian Beef remains the same: it's a comforting dish that brings warmth and satisfaction to the table. Whether served over rice or noodles, this dish is perfect for family dinners or special occasions.

Benefits of Slow Cooking

One of the standout features of this Slow Cooker Mongolian Beef recipe is the method of preparation. Slow cooking allows the flavors to develop deeply, resulting in a tender and juicy beef that practically melts in your mouth. This method is perfect for busy weeknights or meal prep, as you can set it and forget it, coming home to a delicious home-cooked meal.

Additionally, slow cooking is an energy-efficient way to prepare meals. Unlike traditional stovetop cooking, which requires constant attention, a slow cooker can work its magic over several hours. This gives you the freedom to tackle other tasks or simply unwind while your meal cooks to perfection.

Moreover, the slow cooking process helps to tenderize tougher cuts of meat, making it an economical choice for families. With just a few simple ingredients, you can create a restaurant-quality dish that serves several people without breaking the bank.

Serving Suggestions

When it comes to serving Slow Cooker Mongolian Beef, the options are endless. A classic choice is to serve it over fluffy white or brown rice, allowing the grains to soak up the delicious sauce. Alternatively, you can pair it with noodles for a heartier option that complements the beef beautifully.

For a fresh twist, consider adding steamed or stir-fried vegetables to your plate. Broccoli, bell peppers, and snap peas not only add color but also provide a nutritious balance to the dish. You can also sprinkle some sesame seeds over the top for added texture and a nutty flavor.

Don’t forget the garnishes! Chopped green onions add a pop of color and a mild onion flavor that enhances the overall dish. For those who enjoy a bit of heat, a dash of chili oil or sriracha on top can elevate the dish further, making it a personalized meal that suits your taste.

Ingredients

Main Ingredients

  • 2 pounds flank steak, sliced thinly
  • 1 cup soy sauce
  • 1 cup brown sugar
  • 1 tablespoon minced garlic
  • 1 tablespoon minced ginger
  • 1/4 cup cornstarch
  • 1/2 cup water
  • 1/2 teaspoon black pepper
  • 1/4 teaspoon red pepper flakes (optional)
  • 3 green onions, chopped (for garnish)

Serve this dish over rice or noodles for a complete meal.

Instructions

Prepare the Beef

In a bowl, combine the sliced flank steak with cornstarch and toss until well coated.

Mix the Sauce

In a separate bowl, whisk together soy sauce, brown sugar, garlic, ginger, black pepper, and red pepper flakes.

Combine in Slow Cooker

Place the coated beef in the slow cooker and pour the sauce mixture over it. Stir to combine.

Cook

Cover and cook on low for 6 hours or until the beef is tender.

Serve

Garnish with chopped green onions and serve over rice or noodles.

Enjoy your delicious Slow Cooker Mongolian Beef!

Tips for Perfect Mongolian Beef

To achieve the best results with your Slow Cooker Mongolian Beef, it’s essential to cut the flank steak against the grain. This technique helps to break down the muscle fibers, resulting in a more tender texture. If you're unsure, look for the lines in the meat and slice perpendicular to them.

Make sure to coat the beef evenly with cornstarch before cooking. This step not only helps to thicken the sauce but also ensures that the beef retains its juiciness during the slow cooking process. A well-coated beef will lead to a richer and more satisfying sauce.

For added depth of flavor, consider marinating the beef in the sauce ingredients for a few hours before slow cooking. This extra step can enhance the taste even further, allowing the flavors to penetrate deeply into the meat.

Storing and Reheating Leftovers

Leftover Slow Cooker Mongolian Beef can be stored in an airtight container in the refrigerator for up to three days. It also freezes well, making it a great option for meal prep. Simply transfer cooled portions into freezer-safe containers and label them with the date for easy access later.

When reheating, it’s best to do so on the stovetop over low heat to maintain the dish's texture and flavor. If the sauce has thickened in the fridge, you can add a splash of water or broth to loosen it up while warming. Stir occasionally to ensure even heating throughout.

This dish also makes for a delicious lunch option. Consider packing it in a thermos for a warm meal at work or over a salad for a healthier twist. The versatility of Mongolian Beef means it can be enjoyed in various ways even after the initial meal.

Secondary image

Questions About Recipes

→ Can I use a different cut of beef?

Yes, you can use other cuts like sirloin or chuck, but cooking times may vary.

→ Is this recipe gluten-free?

To make it gluten-free, substitute soy sauce with tamari or a gluten-free soy sauce alternative.

→ How can I store leftovers?

Store leftovers in an airtight container in the refrigerator for up to 3 days.

→ Can I freeze this dish?

Yes, you can freeze the Mongolian beef in a freezer-safe container for up to 3 months.

Slow Cooker Mongolian Beef

Indulge in the rich flavors of Slow Cooker Mongolian Beef, a dish that's simple to make and perfect for any occasion.

Prep Time20 minutes
Cooking Duration6 hours
Overall Time6 hours 20 minutes

Created by: Emma

Recipe Type: Quick & Tasty Creations

Skill Level: Intermediate

Final Quantity: 4 servings

What You'll Need

Main Ingredients

  1. 2 pounds flank steak, sliced thinly
  2. 1 cup soy sauce
  3. 1 cup brown sugar
  4. 1 tablespoon minced garlic
  5. 1 tablespoon minced ginger
  6. 1/4 cup cornstarch
  7. 1/2 cup water
  8. 1/2 teaspoon black pepper
  9. 1/4 teaspoon red pepper flakes (optional)
  10. 3 green onions, chopped (for garnish)

How-To Steps

Step 01

In a bowl, combine the sliced flank steak with cornstarch and toss until well coated.

Step 02

In a separate bowl, whisk together soy sauce, brown sugar, garlic, ginger, black pepper, and red pepper flakes.

Step 03

Place the coated beef in the slow cooker and pour the sauce mixture over it. Stir to combine.

Step 04

Cover and cook on low for 6 hours or until the beef is tender.

Step 05

Garnish with chopped green onions and serve over rice or noodles.

Nutritional Breakdown (Per Serving)

  • Calories: 380 kcal
  • Total Fat: 26g
  • Saturated Fat: 15g
  • Cholesterol: 195mg
  • Sodium: 85mg
  • Total Carbohydrates: 32g
  • Dietary Fiber: 3g
  • Sugars: 24g
  • Protein: 6g