Slow Cooker Mongolian Beef

Name: Slow Cooker Mongolian Beef
Prep time: 15 min
Cook time: 3 h
Total time: 3 h 15 min
Cuisine: Asian
Ingredients: 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; 1/2 cup water; 1/2 cup green onions (for garnish)

Jack

Update : February 20, 2026

Delicious slow cooker Mongolian beef served with rice and vegetables

Why Make This Recipe

Slow Cooker Mongolian Beef is a tasty dish that brings the flavors of Asian cuisine right to your kitchen. It’s easy to make and perfect for any day of the week. Using a slow cooker means you can set it and forget it, making it a convenient option for busy families or anyone who wants a home-cooked meal without all the fuss. The tender beef combined with the sweet and savory sauce creates a delicious meal that everyone will enjoy.

How to Make Slow Cooker Mongolian Beef

Ingredients:

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
1/2 cup water
1/2 cup green onions (for garnish)

Directions:

Toss the flank steak with cornstarch in a mixing bowl until evenly coated.
Place the coated steak in a slow cooker and add sesame oil, garlic, ginger, soy sauce, brown sugar, and water. Stir gently to combine.
Cover and cook on HIGH for 2-3 hours or LOW for 4-5 hours until the beef is tender.
Stir in green onions just before serving.

How to Serve Slow Cooker Mongolian Beef

Slow Cooker Mongolian Beef can be served over white or brown rice, which helps soak up the delicious sauce. You can also serve it with steamed vegetables to add some color and nutrition to your plate. A sprinkle of extra green onions on top will enhance the dish’s visual appeal.

How to Store Slow Cooker Mongolian Beef

If you have leftovers, let them cool completely before transferring them to an airtight container. You can store Slow Cooker Mongolian Beef in the refrigerator for up to 3-4 days. To reheat, simply warm it in the microwave or on the stovetop until heated through.

Tips to Make Slow Cooker Mongolian Beef

Make sure to slice the flank steak against the grain. This helps make the meat more tender.
For a thicker sauce, you can mix a little cornstarch with cold water and stir it into the sauce right before serving.
Feel free to add vegetables like bell peppers or broccoli to the slow cooker for added flavor and nutrition.

Variation

You can switch up the protein in this recipe and use chicken instead of beef if you prefer. Just ensure the cooking time is adjusted accordingly, as chicken tends to cook faster.

FAQs

Can I use other cuts of beef?
Yes, you can use other cuts like sirloin or chuck, but cooking times may vary. Just make sure the meat is tender before serving.

Is this dish spicy?
No, Slow Cooker Mongolian Beef is not spicy. It has a sweet and savory flavor profile, making it a crowd-pleaser.

Can I freeze Slow Cooker Mongolian Beef?
Yes, you can freeze it. Just store it in an airtight container for up to 3 months. Thaw in the refrigerator before reheating.