Mongolian Beef Slow Cooker

The smell that filled my apartment when I first attempted Mongolian beef was intoxicating—garlic, ginger, and that sweet-savory sauce bubbling away for hours. My roommate actually poked her head in the kitchen asking what restaurant I'd ordered from, which I took as the highest compliment possible. This slow cooker version transformed what I thought was a takeout-only dish into something completely achievable on a Tuesday evening.

I made this for my parents last winter when they came to visit, and my dad actually went back for thirds which is basically unheard of for him. We sat around the table passing the slow cooker bowl like it was some sacred vessel, scooping sauce over rice until we were all absolutely stuffed. My mom called me the next day asking for the recipe because she couldn't stop thinking about it.

Ingredients

• 2 pounds flank steak: Slice this thinly against the grain—its the secret to tender beef that doesnt feel like youre chewing on rubber
• 3/4 cup low-sodium soy sauce: Regular soy sauce will make this way too salty so trust me on this one
• 3/4 cup brown sugar: This creates that gorgeous caramelized flavor and thick glossy sauce
• 1/2 cup water: Helps balance the intense flavors and keeps everything from becoming too concentrated
• 1/4 cup hoisin sauce: The unsung hero that adds depth and that authentic Chinese takeout taste
• 1 tablespoon sesame oil: A little goes a long way for that nutty aromatic finish
• 4 cloves garlic: Dont be shy with the garlic—it mellows beautifully during the long cooking time
• 1 tablespoon fresh ginger: Fresh is absolutely non-negotiable here for that bright zesty kick
• 1/2 teaspoon crushed red pepper flakes: Optional but I love the gentle heat it adds
• 1/4 cup cornstarch: Youll use half to coat the beef and half to thicken the sauce at the end
• 4 green onions: Fresh garnish cuts through all that rich sweetness
• 1 tablespoon toasted sesame seeds: They add such a lovely crunch and pretty finish

Instructions

Whisk together the sauce:

In a medium bowl combine the soy sauce brown sugar water hoisin sauce sesame oil garlic ginger and red pepper flakes until the sugar completely dissolves

Coat the beef:

Toss the sliced flank steak with half the cornstarch in a zip-top bag until every piece is lightly dusted

Start the slow cooker:

Transfer the coated beef to your slow cooker then pour that gorgeous sauce over everything and give it a good stir

Let it work its magic:

Cover and cook on low for 4 hours until the beef is fork tender and your kitchen smells amazing

Thicken the sauce:

Whisk the remaining cornstarch with cold water then stir it into the slow cooker for the last 30 minutes

Finish and serve:

Spoon over steamed rice and top with those fresh green onions and sesame seeds

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This recipe has become my go-to for dinner parties because it looks so impressive but requires almost zero hands-on time. I love setting everything up in the morning then coming home to a meal that feels like a treat at the end of a long day. Something about the combination of sweet and savory just makes people happy.

Making It Your Own

Ive learned that adding vegetables during the last hour of cooking works beautifully—bell peppers snap peas or even broccoli stems become tender without turning to mush. Sometimes Ill throw in sliced carrots with the beef if I want extra sweetness and color. The sauce is forgiving enough to handle these additions without needing any adjustments.

Rice Perfection

Jasmine rice is my top pick here because its floral aroma complements the ginger and garlic so beautifully. I always rinse my rice until the water runs clear—it makes such a difference in texture. If youre feeling fancy try fried rice on the side or even serve this over cauliflower rice for a lighter version.

Leftover Magic

This somehow tastes even better the next day when all those flavors have had even more time to mingle together. I love packing it for lunch with extra green onions sprinkled on top right before eating. The sauce thickens up beautifully in the fridge so you might want to splash in a teaspoon of water when reheating.

• Freeze portions in individual containers for those nights when cooking feels impossible
• The sauce works beautifully tossed with noodles for a completely different meal
• Crispy cucumber salad on the side cuts through the richness perfectly

Save

Theres something so satisfying about making a dish that tastes like it came from a restaurant but with your own hands. Hope this becomes one of those recipes you turn to again and again.

Recipe FAQs

→ What cut of beef works best for this dish?

Flank steak is recommended for its tenderness and ability to absorb flavors well. It should be thinly sliced across the grain to ensure maximum tenderness when cooked.

→ Can I make this gluten-free?

Yes, simply substitute tamari for soy sauce and use a gluten-free hoisin sauce. The cornstarch can also be replaced with arrowroot powder if needed.

→ How do I prevent the beef from becoming tough?

Be sure to slice the beef thinly across the grain and avoid overcooking. The slow cooker on low heat for 4 hours should result in tender, melt-in-your-mouth beef.

→ What can I serve this with besides rice?

This dish pairs well with jasmine or basmati rice, but also works great over steamed broccoli for a low-carb option, or with noodles for a complete meal.

→ Can I add vegetables to this dish?

Yes, you can add sliced carrots or bell peppers with the beef for extra depth and nutrition. Add them at the beginning so they cook properly.