Weeknight dinners need to be honest: flavorful, reliable, and not full of coaxing. This Slow Cooker Mongolian Chicken hits all three. It’s one of those recipes I turn to when I want Chinese takeout vibes without the takeout price or mess. It leans on a simple brown-sugar-forward sauce, soft tender chicken, and just enough aromatic bite from green onions to feel special.
I like to keep a routine for slow-cooker meals so everything feels effortless. A quick toss of chicken with cornstarch gives the pieces a lightly coated texture that thickens the sauce; the grated carrots add subtle sweetness and texture without needing a separate vegetable side. The slow cooker does the heavy lifting—set it and go—so you can get on with life and come back to a warm, homey meal.
Below you’ll find the exact ingredients and the exact step-by-step slow-cooker directions I use when I make this at home. I’ll also cover equipment, common missteps with quick fixes, sensible substitutions, and make-ahead tips so you can get comfortable with this recipe and rely on it week after week.
What We’re Using
This recipe keeps the ingredient list focused and straightforward. The backbone is boneless skinless chicken breasts coated in cornstarch (for a lightly velvety exterior), simmered in a sauce built from olive oil, garlic, soy sauce, water, and brown sugar, with grated carrots folded in to round things out. Green onions finish the dish for brightness.
Because everything cooks low and slow, the technique is forgiving. The cornstarch helps the sauce cling to the chicken. Low-sodium soy sauce prevents the finished sauce from becoming overwhelmingly salty while still providing that umami depth. The goal is a caramelized, slightly sticky sauce without fussy pan work.
Ingredients
- 1poundboneless skinless chicken breasts,cut into 1-inch cubes — the primary protein; cutting to uniform 1-inch cubes ensures even cooking.
- ¼cupscornstarch — creates a light coating that helps thicken the sauce and gives the chicken a pleasant mouthfeel.
- 2tablespoonsolive oil — the flavor carrier for the sauce; helps distribute the garlic and sugar.
- 1teaspoonminced garlic — aromatic base note; keep it minced so it disperses through the sauce.
- ½cuplow-sodium soy sauce — provides the savory backbone; low-sodium keeps the salt level in check.
- ½cupwater — thins the sauce enough for slow-cooker simmering so it doesn’t become cloying.
- ½cupbrown sugar — the sweet element that caramelizes into the classic Mongolian-style glaze.
- 1cupgrated carrots — adds texture, sweetness, and color; grating lets them cook fully in the slow cooker.
- green onions,for garnish — finishing touch for freshness and a mild onion bite.
How to Prepare Slow Cooker Mongolian Chicken
- Place 1 pound boneless skinless chicken breasts (cut into 1-inch cubes) and 1/4 cup cornstarch in a large zip-top bag. Seal and shake until the chicken is evenly coated.
- In the slow cooker, whisk together 2 tablespoons olive oil, 1 teaspoon minced garlic, 1/2 cup low-sodium soy sauce, 1/2 cup water, 1/2 cup brown sugar, and 1 cup grated carrots until combined.
- Add the coated chicken to the slow cooker and stir to coat the chicken evenly with the sauce.
- Cover and cook on LOW for 4–5 hours or HIGH for 2–3 hours, until the chicken is fully cooked (internal temperature 165°F/74°C) and tender.
- Stir once more to combine, then garnish with green onions and serve.
Why This Recipe Belongs in Your Rotation
It’s straightforward and consistently good. The flavor profile—sweet, salty, and savory—hits familiar comfort notes without needing dozens of pantry items. It’s a great weeknight option because prep is quick: 10–15 minutes of hands-on time tops. Drop the coated chicken into the cooker, whisk the sauce, and let slow, gentle heat create tender, flavorful results.
Another reason I keep this on repeat is its flexibility. Serve it over rice or noodles, spoon it into grain bowls with steamed broccoli, or let it star in lettuce wraps. The sauce is forgiving; it thickens nicely from the cornstarch coating and the slow reduction so you end up with a pleasing glaze even if you cut one hour off the cook time by accident.
Texture-Safe Substitutions
If you need to adjust the texture for dietary preferences or simply want variety, here are sensible swaps that maintain the dish’s integrity.
Protein options
- Boneless skinless chicken thighs — more forgiving than breasts and slightly richer if you prefer darker meat.
- Tofu (firm or extra-firm, pressed and cubed) — adds plant-based protein and soaks up the sauce; press well to avoid a soggy texture.
Sauce & thickening swaps
- Skip or reduce the cornstarch coating if you prefer a thinner sauce; you’ll notice a looser glaze but still flavorful chicken.
- Brown sugar can be reduced for a less-sweet finish; balance with a touch more water or a splash of soy to maintain sauciness.
Equipment & Tools
Keep it simple. A 4- to 6-quart slow cooker handles this recipe comfortably. You’ll also need a large zip-top bag for tossing the chicken with cornstarch, and a whisk for combining the sauce ingredients directly in the cooker. A digital instant-read thermometer is handy to confirm the chicken reaches 165°F/74°C.
Optional tools: a microplane for the carrots if you prefer ultra-fine shredding, or a vegetable grater if you want visible carrot strands. A slotted spoon makes serving easier if there’s any excess sauce you’d rather leave behind for plating.
Missteps & Fixes
Sauce too thin
If you come back and the sauce seems looser than you’d like, remove the lid and switch the slow cooker to HIGH for the last 20–30 minutes to reduce and concentrate the sauce. Alternatively, transfer the cooked contents to a saucepan and simmer briefly until it thickens to your liking.
Chicken is dry or overcooked
Chicken can dry if left on HIGH too long. If you notice dryness, shred the chicken and toss it back into the sauce; the shredded pieces better absorb moisture. Next time, prefer the LOW setting to keep the meat tender and juicy.
Too sweet
If the brown sugar reads too dominant for your taste, balance it at the end with a squeeze of citrus (lemon or lime) or a splash of rice vinegar to add brightness. Add a little at a time and taste as you go.
Make It Diet-Friendly
Small tweaks make a big difference without losing the essence of the dish. Reduce the brown sugar or cut it by half to lower calories and sugar; the dish will be less sticky but still savory. Using low-sodium soy sauce (already in the ingredients) is important for controlling sodium.
For a lower-carb meal, skip serving over rice and pile the Mongolian chicken onto steamed cauliflower rice or leafy greens. To reduce fat, keep the olive oil amount the same for flavor but avoid adding extra fats at serving.
Behind-the-Scenes Notes
I tested this recipe several times to make sure the slow-cooker timing and the cornstarch coating work together. The cornstarch does two jobs: it creates a lightly silky exterior on each chicken cube and helps the sauce cling without needing a separate slurry at the end. The grated carrots do more than add color; they act like a vegetable buffer so the dish feels complete on the plate without extra sides.
One small habit I adopted is tasting the sauce before adding the chicken: whisk the sauce in the crock, taste a tiny dab (careful—it’s salty and sweet), and adjust if the balance feels off. You can add a pinch more sugar or a splash of water if needed before the long cook.
Make Ahead Like a Pro
This recipe is very friendly to make-ahead. You can coat the cubed chicken with cornstarch and store it in the zip-top bag in the fridge for up to 24 hours. Alternatively, mix the sauce in advance and refrigerate it separately; when you’re ready, pour it into the slow cooker, add the coated chicken, and start the cook.
Leftovers keep well for 3–4 days in the refrigerator. Reheat gently in a skillet over medium heat or in the microwave, stirring occasionally. If the sauce has thickened too much when chilled, stir in a tablespoon or two of water while reheating to loosen it slightly.
Your Top Questions
Can I use frozen chicken?
It’s safer to thaw the chicken first for even cooking and to stay within recommended slow-cooker practice. Adding frozen chicken extends cooking time and can lead to uneven results.
Is this authentically Mongolian?
“Mongolian” in American takeout is more of a flavor shorthand than a strict culinary lineage. This dish borrows the sweet-savory glaze associated with Mongolian-style sauces but adapts for simple home cooking and the slow cooker.
Can I add vegetables?
Yes. Heartier vegetables—bell peppers, broccoli florets, or snap peas—work if added at the right time. Add quick-cooking veggies in the last 30–60 minutes so they stay crisp-tender; denser vegetables like carrots (if not grated) should go in earlier.
How can I thicken the sauce at the end?
Remove a cup of sauce to a small bowl, whisk in a little cornstarch to make a slurry, stir it back into the slow cooker, and switch to HIGH or transfer to a saucepan to cook until thickened. Or simply uncover and reduce the sauce for 20–30 minutes.
That’s a Wrap
Slow Cooker Mongolian Chicken is a dependable, cozy dinner that feels like a treat without demanding much from you. Prep is fast, the slow cooker does the heavy lifting, and the results are tender, saucy, and satisfying. Keep the components simple, taste the sauce before cooking, and use the LOW setting when in doubt for the best texture.
I hope this becomes one of your go-to slow-cooker dinners. When I serve it, I always set out a simple bowl of steamed rice and a little extra green onion for sprinkling—minimal fuss, maximum comfort. Enjoy.
Slow Cooker Mongolian Chicken
Equipment
- Slow Cooker
- Zip-top Bag
- Whisk
Ingredients
Ingredients
- 1 poundboneless skinless chicken breasts cut into 1-inch cubes
- 1/4 cupscornstarch
- 2 tablespoonsolive oil
- 1 teaspoonminced garlic
- 1/2 cuplow-sodium soy sauce
- 1/2 cupwater
- 1/2 cupbrown sugar
- 1 cupgrated carrots
- green onions for garnish
Instructions
Instructions
- Place 1 pound boneless skinless chicken breasts (cut into 1-inch cubes) and 1/4 cup cornstarch in a large zip-top bag. Seal and shake until the chicken is evenly coated.
- In the slow cooker, whisk together 2 tablespoons olive oil, 1 teaspoon minced garlic, 1/2 cup low-sodium soy sauce, 1/2 cup water, 1/2 cup brown sugar, and 1 cup grated carrots until combined.
- Add the coated chicken to the slow cooker and stir to coat the chicken evenly with the sauce.
- Cover and cook on LOW for 4–5 hours or HIGH for 2–3 hours, until the chicken is fully cooked (internal temperature 165°F/74°C) and tender.
- Stir once more to combine, then garnish with green onions and serve.
