Mongolian Chicken Crock Pot Recipe: Sweet and Spicy Slow-Cooked Magic

This crock pot version of Mongolian chicken brings bold Asian flavors to your dinner table with minimal effort. The slow cooker transforms simple ingredients into a sweet and spicy dish that rivals takeout.

Tender chicken thighs soak up a rich sauce made with soy, brown sugar, and garlic. A touch of ginger and chili adds depth while keeping the dish approachable for all palates.

The hands-off method lets you prep everything in the morning and return to a restaurant-quality meal. The sauce thickens beautifully as it cooks, coating every piece of chicken.

Serve over steamed rice with green onions for a complete, satisfying dinner the whole family will love.

Ingredients for Mongolian Chicken Crock Pot

Bold flavors start with simple ingredients: chicken, soy, and a touch of heat.

The chicken thighs are non-negotiable here—bone-in won’t work in a crock pot for this timing. I grab mine from Costco (great value, pre-portioned) or Whole Foods if I want organic. Look for thighs with good marbling; they stay juicy during the long cook. The soy sauce should be low-sodium (the sauce reduces, so it gets intense) and Kikkoman or San-J are reliable brands.

No rice vinegar? Apple cider vinegar at the same amount works—just avoid white vinegar (too harsh). Out of brown sugar? Coconut sugar or regular granulated plus a splash of molasses gets you close. The chili peppers are flexible too—skip them for mild heat or add sriracha at the end (start with 1 tbsp). The ginger must be fresh though; powder just doesn’t compare.

Prep everything the night before (except the cornstarch slurry—do that fresh). Leftovers keep 4-5 days in the fridge, freezes for 3 months. The sauce thickens more as it cools, so thin with water when reheating (a splash at a time).

Step-by-Step Instructions for Mongolian Chicken Crock Pot

This slow-cooker method delivers tender chicken with a glossy, flavor-packed sauce with minimal effort.

Step 1: Prepare the Chicken and Sauce Base

Trim the 2 lb Boneless Skinless Chicken Thighs of any excess fat, then cut them into 1-inch pieces. This ensures even cooking and maximum surface area for the sauce to cling to. Place the chicken in the crock pot.

In a medium bowl, whisk together the 0.75 cup Low-Sodium Soy Sauce, 0.75 cup Light Brown Sugar, minced 5 cloves Fresh Garlic Cloves, grated 1 tbsp Fresh Ginger Root, 0.25 cup Rice Vinegar, and 1 tbsp Sesame Oil. The sugar should dissolve completely, creating a smooth, glossy mixture.

Step 2: Add Aromatics and Start Slow Cooking

Add the 2 whole Dried Red Chili Peppers to the sauce mixture. These will infuse the sauce with a subtle heat as they simmer. Pour the sauce over the chicken in the crock pot and stir to coat every piece evenly.

Cover and cook on low heat for 3-4 hours or on high heat for 2-2.5 hours. The chicken is done when it shreds easily with a fork and the sauce has deepened in color. Stir once halfway through cooking to redistribute the chicken in the sauce.

Step 3: Thicken the Sauce

Once the chicken is cooked, transfer it to a serving bowl and cover to keep warm. In a small bowl, whisk together the 2 tbsp Cornstarch and 0.25 cup Water until smooth. This slurry will thicken the sauce without creating lumps.

Pour the cornstarch mixture into the crock pot with the remaining sauce and stir well. Cover and cook on high heat for an additional 15-20 minutes, stirring once or twice, until the sauce has thickened to a syrupy consistency that coats the back of a spoon.

Step 4: Garnish and Serve

Thinly slice the 4 whole Green Onions and toast the 1 tbsp Sesame Seeds in a dry skillet over medium heat for 1-2 minutes until fragrant and just beginning to brown. Watch them closely—they burn easily.

Return the chicken to the crock pot and stir to coat it in the thickened sauce. Transfer to a serving dish, then sprinkle the green onions and toasted sesame seeds over the top. Serve immediately over steamed rice or noodles to soak up the rich, glossy sauce.

Flavor Customization for This Dish

Spice Level Adjustments

For mild heat, remove the dried red chili peppers entirely before cooking. I often do this when serving to kids. For medium heat, leave them whole as written. For serious spice lovers, add 1 tbsp sriracha at the end. 🌶️

Sweetness Tweaks

Reduce the brown sugar to ½ cup for a less sweet version that lets the savory soy shine. For extra caramelized depth, increase to 1 cup—the sauce will thicken more and develop a glossier finish.

Umami Boosters

Add 1 tbsp hoisin sauce to the sauce mixture for complexity. I also love stirring in 1 tsp fish sauce at the end for that authentic restaurant depth. Both additions work beautifully without overpowering.

Citrus Brightness

For a tangy twist, add zest of 1 orange to the sauce. The bright citrus lifts the rich flavors. Alternatively, swap the rice vinegar for lime juice—use the same ¼ cup measurement.

Vegetable Additions

Add 1 bell pepper (sliced) or 1 cup snap peas during the last 30 minutes of cooking. They soften just enough while retaining color and crunch. Stir in 2 cups baby spinach at the very end for a quick wilt.

Protein Swaps

Beef lovers can substitute 1.5 lb flank steak (sliced thin). For a vegetarian version, use extra-firm tofu (pressed and cubed). Both absorb the sauce equally well, though beef needs 30 extra minutes on low. 💡

Frequently Asked Questions