Slow Cooker Mongolian Beef

Highlighted under: Cultural Kitchen Discoveries

This Slow Cooker Mongolian Beef is a tender and flavorful dish that will become a family favorite. Perfectly cooked beef with a sweet and savory sauce makes for an easy weeknight dinner.

Emma

Created by

Emma

Last updated on 2025-12-02T20:06:09.701Z

Slow Cooker Mongolian Beef is a comforting dish that combines tender beef with a rich, sweet sauce. It's ideal for busy weeknights or a cozy weekend dinner.

Why You'll Love This Recipe

  • Rich, savory flavors that are perfectly balanced
  • Tender beef that falls apart with a fork
  • Easy to prepare and cooks while you go about your day
  • Perfectly pairs with steamed rice or noodles

The Origin of Mongolian Beef

Mongolian Beef is a dish that many people associate with Chinese-American cuisine rather than its namesake country of Mongolia. It is believed to have been inspired by traditional Mongolian flavors, which emphasize the use of beef and simple yet rich sauces. The combination of soy sauce, ginger, and garlic is a nod to Asian culinary practices, while the sweetness of brown sugar adds a unique twist that appeals to a wide range of palates.

While Mongolian Beef may not be a staple in Mongolia, its popularity in Western cuisine showcases how culinary traditions can evolve and adapt. This dish often features tender cuts of beef that are cooked in a savory sauce, and it is frequently served over rice or noodles, making it a comforting and satisfying meal.

Tips for Perfectly Cooked Beef

To achieve the most tender Mongolian Beef, it’s important to slice the flank steak against the grain. This method shortens the muscle fibers, resulting in a more tender bite. If you’re unsure, look for the direction in which the fibers are running and cut perpendicular to those lines. A sharp knife will make this task easier and more effective.

Marinating the beef in the sauce for at least 30 minutes before slow cooking can enhance the flavor profile. This step allows the beef to absorb the savory and sweet elements of the sauce, resulting in a richer taste. However, if you’re short on time, you can skip this step and still achieve delicious results.

Serving Suggestions

Mongolian Beef is incredibly versatile when it comes to serving options. While it is traditionally served over steamed rice or noodles, consider adding a side of steamed vegetables for a nutritious twist. Broccoli, snap peas, or bell peppers complement the dish beautifully and add color to your plate.

If you're looking to elevate your meal, you can also serve Mongolian Beef with a drizzle of chili oil or a sprinkle of crushed peanuts for an added layer of flavor. Each of these options not only enhances the taste but also adds a delightful crunch to this already satisfying dish.

Ingredients

For the Beef

  • 2 lbs flank steak, sliced into thin strips
  • 1/2 cup soy sauce
  • 1/2 cup brown sugar
  • 1/4 cup water
  • 1 tablespoon minced garlic
  • 1 tablespoon minced ginger
  • 1/4 teaspoon red pepper flakes
  • 1 tablespoon cornstarch
  • 2 tablespoons vegetable oil

For Garnish

  • Sliced green onions
  • Sesame seeds

Mix the sauce ingredients in a separate bowl before adding them to the slow cooker.

Instructions

Prepare the Beef

In a large bowl, combine the soy sauce, brown sugar, water, minced garlic, minced ginger, and red pepper flakes. Stir until the sugar is dissolved.

Add to Slow Cooker

Place the sliced flank steak in the slow cooker. Pour the sauce over the beef and stir to combine.

Cook

Cover and cook on low for 6 hours or high for 3 hours, until the beef is tender.

Thicken the Sauce

About 30 minutes before serving, mix the cornstarch with a little water to make a slurry. Stir it into the slow cooker and let it cook uncovered for the remaining time to thicken the sauce.

Serve

Serve the Mongolian beef over rice or noodles, garnished with sliced green onions and sesame seeds.

Enjoy your delicious meal!

Storage and Reheating Tips

Leftover Mongolian Beef can be stored in an airtight container in the refrigerator for up to three days. To keep the flavors fresh, make sure to let it cool to room temperature before sealing it. For longer storage, consider freezing the beef for up to three months; just be sure to thaw it overnight in the fridge before reheating.

When reheating, a stovetop is often the best method to retain the dish's original texture. Simply add a splash of water or broth to a pan and heat over medium, stirring occasionally until warmed through. Alternatively, you can use the microwave, but be cautious not to overheat, as this can lead to tough beef.

Customization Ideas

One of the best aspects of Slow Cooker Mongolian Beef is its adaptability. You can easily modify the recipe to suit your dietary preferences or available ingredients. For a lighter version, consider using chicken or tofu instead of beef, and adjust the cooking time accordingly. These alternatives will absorb the flavors of the sauce beautifully.

You might also experiment with different vegetables. Adding sliced bell peppers, carrots, or snow peas can enhance the dish’s nutritional value while introducing new textures and flavors. Just toss them into the slow cooker in the last hour of cooking to ensure they don't become overly soft.

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Questions About Recipes

→ Can I use a different cut of beef?

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

→ Is it possible to freeze the leftover Mongolian beef?

Yes, you can freeze the leftovers in an airtight container for up to 3 months.

→ What can I serve with Mongolian beef?

It pairs well with steamed rice, noodles, or stir-fried vegetables.

→ Can I make this recipe spicy?

Absolutely! Add more red pepper flakes or sliced jalapeños to the sauce to increase the heat.

Slow Cooker Mongolian Beef

This Slow Cooker Mongolian Beef is a tender and flavorful dish that will become a family favorite. Perfectly cooked beef with a sweet and savory sauce makes for an easy weeknight dinner.

Prep Time15 minutes
Cooking Duration6 hours
Overall Time6 hours 15 minutes

Created by: Emma

Recipe Type: Cultural Kitchen Discoveries

Skill Level: Intermediate

Final Quantity: 4 servings

What You'll Need

For the Beef

  1. 2 lbs flank steak, sliced into thin strips
  2. 1/2 cup soy sauce
  3. 1/2 cup brown sugar
  4. 1/4 cup water
  5. 1 tablespoon minced garlic
  6. 1 tablespoon minced ginger
  7. 1/4 teaspoon red pepper flakes
  8. 1 tablespoon cornstarch
  9. 2 tablespoons vegetable oil

For Garnish

  1. Sliced green onions
  2. Sesame seeds

How-To Steps

Step 01

In a large bowl, combine the soy sauce, brown sugar, water, minced garlic, minced ginger, and red pepper flakes. Stir until the sugar is dissolved.

Step 02

Place the sliced flank steak in the slow cooker. Pour the sauce over the beef and stir to combine.

Step 03

Cover and cook on low for 6 hours or high for 3 hours, until the beef is tender.

Step 04

About 30 minutes before serving, mix the cornstarch with a little water to make a slurry. Stir it into the slow cooker and let it cook uncovered for the remaining time to thicken the sauce.

Step 05

Serve the Mongolian beef over rice or noodles, garnished with sliced green onions and sesame seeds.

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