Name: Slow Cooker Mongolian Beef Recipe
Prep time: 10 min
Cook time: 5 h
Total time: 5 h 10 min
Cuisine: Asian-Inspired
Ingredients: 1½ lbs flank steak, sliced thin; ½ cup soy sauce; ½ cup brown sugar; 1 cup beef broth; 4 cloves garlic, minced; 1 tsp ginger, grated or ground; 2 tbsp cornstarch; 2 tbsp water (for cornstarch slurry); 3 green onions, sliced

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If you love the irresistible combination of sweet and savory flavors with tender beef, you are going to adore this Slow Cooker Mongolian Beef Recipe. Picture perfectly thin slices of flank steak slow-cooked to melt-in-your-mouth tenderness, bathed in a luscious soy-garlic sauce with just the right touch of brown sugar sweetness and ginger warmth. This easy crockpot recipe brings all the deliciousness of your favorite takeout dish straight to your kitchen with almost no fuss, making weeknight dinners feel effortlessly special.

Ingredients You’ll Need

A white bowl sits on a wooden board filled with raw red meat strips topped with a white powdery ingredient, likely cornstarch. Below it, three small white bowls contain different ingredients: the left bowl holds minced garlic in golden oil, the middle bowl has a dark, glossy liquid like soy sauce, and the right bowl is full of light brown granulated sugar. A fresh green onion with vibrant green leaves and white bulb rests diagonally across the board. The background is a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

This Slow Cooker Mongolian Beef Recipe calls for a handful of simple yet essential ingredients, each playing a vital role in building those deep, harmonious flavors and that rich, velvety sauce. Don’t let the simplicity fool you—these ingredients come together to produce an unforgettable dish.

Flank steak, 1½ lbs: Thin slices ensure quick, tender cooking and perfect texture for soaking up the sauce.
Soy sauce, ½ cup: This salty, umami powerhouse forms the savory base of the sauce.
Brown sugar, ½ cup: Adds a caramelized sweetness that balances the saltiness beautifully.
Beef broth, 1 cup: Deepens the flavor and gives the sauce its rich body.
Garlic, 4 cloves, minced: Infuses the dish with fragrant, aromatic notes to complement the soy.
Ginger, 1 tsp: A subtle spicy warmth that lifts the entire flavor profile.
Cornstarch, 2 tbsp: Used to thicken the sauce into the glossy, clingy finish everyone loves.
Green onions, 3 sliced: Fresh garnish that adds color and a bright, oniony crunch.

How to Make Slow Cooker Mongolian Beef Recipe

Step 1: Prepare the Steak

Start by slicing your flank steak thinly against the grain. This step is crucial for tender pieces that will absorb all the rich Mongolian flavors without turning tough. Once sliced, place the beef evenly at the bottom of your slow cooker, setting the stage for a perfectly cooked dish.

Step 2: Mix the Sauce

In a bowl, whisk together the soy sauce, brown sugar, beef broth, minced garlic, and ginger. This mixture combines salty, sweet, and aromatic components that are signature to this Slow Cooker Mongolian Beef Recipe. Pour the sauce directly over the steak in the slow cooker to coat every delicious strip.

Step 3: Slow Cook the Beef

Set your slow cooker to low and cover. Let the beef cook for 4 to 5 hours, allowing the flavors to deeply infuse and the meat to become delectably tender. This gentle cooking method transforms simple ingredients into a rich, comforting meal.

Step 4: Thicken the Sauce

Once the cooking time is up, mix the cornstarch with 2 tablespoons of water to create a slurry. Stir this into the slow cooker and cook for an additional 15 minutes. This thickening step gives you that signature glossy, thick sauce that clings beautifully to every bite.

Step 5: Garnish and Serve

Just before serving, sprinkle the sliced green onions on top for a fresh, vibrant pop of color and a mild onion bite. Your Slow Cooker Mongolian Beef Recipe is now ready to be enjoyed!

How to Serve Slow Cooker Mongolian Beef Recipe

This image shows a dish with a base layer of plain white rice spread evenly on a white bowl sitting on a white marbled surface. On top of the rice, there is a thick layer of dark brown meat glazed with a shiny sauce, mixed with thin red pepper strips adding a bright contrast. The meat looks tender and juicy, garnished with small green chopped scallions and sprinkled white sesame seeds for texture. The colors are rich with dark brown, bright red, fresh green, and white all balanced nicely in the bowl photo taken with an iphone --ar 4:5 --v 7

Garnishes

Green onions are classic, but feel free to add a sprinkle of toasted sesame seeds for some nuttiness and crunch. A drizzle of sesame oil can also elevate the aroma and give a lovely finish. These simple garnishes add brightness and interest to the rich dish.

Side Dishes

This Mongolian beef pairs beautifully with steamed white or jasmine rice, which soaks up the delicious sauce perfectly. If you prefer noodles, try serving it over rice noodles or egg noodles for a comforting Asian-inspired bowl. Steamed or stir-fried veggies like broccoli or snap peas offer a fresh and crunchy contrast.

Creative Ways to Present

For a fun twist, serve this Slow Cooker Mongolian Beef Recipe as a filling in lettuce wraps, adding a crisp texture and making for a light, flavorful appetizer or lunch. You can also turn it into a rice bowl topped with avocado slices and a fried egg for a restaurant-style experience at home!

Make Ahead and Storage

Storing Leftovers

Store any leftover Slow Cooker Mongolian Beef in an airtight container in the refrigerator for up to 3 days. The sauce will thicken as it cools, but simply reheat gently and stir in a splash of water or broth to loosen it back up if needed.

Freezing

This dish freezes surprisingly well. Place cooled leftovers in a freezer-safe container and freeze for up to 2 months. To preserve texture, it’s best to freeze the beef and sauce together but keep any fresh garnishes or sides separate.

Reheating

Reheat the beef gently on the stovetop over low heat, stirring occasionally. Add a little water or broth if the sauce is too thick. Alternatively, warming in the microwave works fine—just cover and heat in short intervals to avoid drying out the beef.

FAQs

Can I use a different cut of beef for this recipe?

Absolutely! While flank steak is ideal for its tenderness and thin slicing, sirloin or skirt steak can also work well. Just ensure the meat is thinly sliced to cook evenly and stay tender in the slow cooker.

Is it possible to make this recipe gluten-free?

Yes! Just swap regular soy sauce with a gluten-free tamari or coconut aminos. This simple substitution keeps all the flavors intact while making your Slow Cooker Mongolian Beef Recipe safe for gluten-sensitive diners.

How can I make the sauce thicker without cornstarch?

If you prefer not to use cornstarch, you can reduce the sauce by cooking it uncovered on the stovetop after slow cooking. Simmer gently until it reaches your desired thickness, stirring to avoid burning.

Can I add vegetables to this dish?

You can add veggies like bell peppers, broccoli, or mushrooms during the last hour of cooking for added nutrition and texture. Be mindful not to overcook them, as they might become too soft if left in the slow cooker too long.

What if I want to double the recipe?

Doubling is straightforward—just use a larger slow cooker to ensure even cooking. Cook time stays roughly the same but keep an eye on it, as larger quantities can sometimes require extra time to heat through fully.

Final Thoughts

If you are craving a comforting, flavorful meal that feels like a celebration but fits effortlessly into your busy day, this Slow Cooker Mongolian Beef Recipe is a must-try. From the first bite, you’ll understand why it’s become such a beloved favorite. Give it a go, and I promise it will find a permanent spot in your recipe rotation! Happy cooking!