There’s nothing quite like coming home to the comforting aroma of a slow cooker meal, and this slow cooker Mongolian beef is one of those recipes that makes the whole house smell like your favorite takeout spot but tastes even better because it’s homemade.

I first made this on a chilly day when I wanted something warm, cozy and satisfying but didn’t want to stand over the stove for an hour after work. I dumped everything in the slow cooker, turned it on, and a few hours later, the kitchen was filled with the rich scent of garlic, ginger and soy sauce, wrapping the whole house in warmth and comfort.

It’s the kind of recipe you’ll turn to when you want a low-effort dinner that tastes like a restaurant meal, and it’s perfect for busy weeknights, game day gatherings or even a cozy Sunday dinner with your family.

Why you’ll love this slow cooker Mongolian beef

Tender and flavorful – The beef cooks low and slow, soaking up a rich, sweet-savory sauce.

✅ Hands-off cooking: Let your slow cooker do all the heavy lifting.
✅ Better than takeout: Skip the restaurant bill and control your ingredients.
✅ Family-approved: Kid-friendly and picky-eater friendly.
✅ Versatile serving options: Serve over rice, noodles, or in lettuce cups for a lighter option.

Ingredients

Here’s what you need to bring this restaurant-style dish to your kitchen:

Cornstarch: Helps thicken the sauce and coat the beef
Beef Flank Steak: Ideal for its tenderness when slow-cooked
Ginger: Adds warmth
Garlic: Adds depth to the sauce
Soy Sauce: For savory, umami flavor
Water: Helps create the sauce base
Brown Sugar: Balances the saltiness with sweetness
Sriracha: Adds a gentle heat (add more if you love spice)
Shredded Carrots: For color and a hint of sweetness
Green Onions: For garnish
Sesame Seeds: For garnish

How to make slow cooker Mongolian beef

Imagine us chatting while you prep, coffee in hand, tossing everything in the slow cooker to let it do the work while you conquer the day:

1️⃣ Coat the beef

Place the flank steak strips and cornstarch into a large ziplock bag.
Shake well until each piece is coated (this helps the sauce thicken and the beef brown slightly).

2️⃣ ADD TO THE SLOW coOKER

Transfer the coated beef to your slow cooker.

3️⃣ Mix the sauce

In a mixing bowl, whisk together the soy sauce, water, brown sugar, minced garlic, minced ginger and sriracha until combined.

4️⃣ Combine and cook

Pour the sauce over the beef in the slow cooker.
Add shredded carrots on top.
Cover and cook on high for two to three hours or low for four to five hours, stirring once halfway through to ensure even cooking.
The beef should be tender and the sauce thickened.

5️⃣ Garnish and serve

Garnish with freshly chopped green onions and a sprinkle of sesame seeds for a beautiful finish.
Serve the Mongolian beef over fluffy white rice, jasmine rice, brown rice or noodles.

Slow Cooker Mongolian Beef Process Steps in Photos.

Serving suggestions

This slow cooker Mongolian beef pairs perfectly with:

🍚 Steamed rice: Jasmine, basmati, or brown rice.
🍜 Noodles: Rice noodles or ramen for a takeout-inspired meal.
🥬 Lettuce wraps: Serve in crisp romaine or butter lettuce for a lighter, low-carb option.
🥦 Steamed broccoli or snap peas: For extra veggies and color on your plate
🌶️ A sprinkle of crushed red pepper: If you like extra heat

Storage + make-ahead tips

This recipe is perfect for meal prep and leftovers:

Store leftovers in an airtight container in the refrigerator for up to four days.
Reheat gently in a skillet or microwave until heated through.
Freeze after allowing the Mongolian beef to cool. Transfer to freezer-safe containers or bags and freeze for up to three months. Thaw overnight in the fridge before reheating.

Variations + substitutions

Feel free to adjust this recipe to fit your taste or pantry:

Spicier: Add more sriracha or a pinch of crushed red pepper flakes.
Sweeter: Add an extra tablespoon of brown sugar if you prefer a sweeter sauce.
Veggie-loaded: Add bell peppers, broccoli florets, or snow peas during the last hour of cooking for extra color and nutrition.
Different cuts of beef: You can use thinly sliced sirloin or even stew meat if flank steak isn’t available (cooking time may vary).
Gluten-free: Use tamari or coconut aminos instead of soy sauce.

Helpful tools

Make the process seamless with these tools:

Large slow cooker: Essential for hands-off, tender beef
Sharp chef’s knife: For slicing the flank steak thinly
Large ziplock bag: For easy coating of beef with cornstarch
Mixing bowls: For whisking your sauce

Final Thoughts: Why this recipe matters

There’s a reason I come back to this Slow Cooker Mongolian Beef again and again: it’s that perfect combination of easy, comforting, and packed with flavor. It’s the kind of meal that makes dinnertime feel special, even on a busy weekday, and the leftovers (if you have any!) taste just as good the next day.

It’s a recipe that feels like a warm hug from your slow cooker, saving you time while still delivering a dinner that your whole family will love, request, and look forward to. Pair it with rice, grab your chopsticks, and settle in for a cozy dinner that’s better than takeout, without ever leaving your kitchen.

📌 Pin It + Print It

Be sure to pin this recipe to your slow cooker or easy dinner boards, and print the recipe card so you can keep it handy for your next cozy dinner night.

More Grandma-approved recipes to try

If you enjoyed this recipe for slow cooker Mongolian beef, I bet you’ll love these, too: