Korean BBQ Chicken Slow Cooker Recipe: Sweet and Spicy Hands-Off Feast

This slow cooker method brings authentic Korean BBQ flavors to your kitchen with minimal effort. The chicken becomes irresistibly tender while soaking up the sweet-spicy sauce.

I developed this recipe to capture the depth of traditional Korean marinades without the hands-on work. The result is fall-off-the-bone chicken with caramelized edges.

Ingredients for Korean Bbq Chicken Slow Cooker

Authentic Korean BBQ flavors start with these quality ingredients and a slow cooker.

[recipe_ingredient_scaler]

The chicken is the foundation here. Boneless, skinless thighs stay juicy during the long cook—breasts tend to dry out. For the gochujang, look for the red tubs at H Mart or Korean grocers (or the Asian aisle at Whole Foods). It should be thick, spicy, and slightly sweet. The soy sauce should be Korean or Japanese—avoid the overly salty Chinese varieties for this dish.

No gochujang? Sriracha mixed with a touch of miso gets you close, but the flavor won’t be as deep. Brown sugar can be swapped for honey or maple syrup, though the texture will differ slightly. Out of rice vinegar? Apple cider vinegar at half the amount works. For the sesame oil, toasted is non-negotiable—untoasted lacks the nutty aroma that defines this sauce.

The sauce thickens as it cools. Leftovers keep 4-5 days in the fridge, freezes for 3 months. Reheat gently to avoid curdling the sauce. Toast the sesame seeds just before serving—they lose crunch if done too early.

Step-by-Step Instructions for Korean BBQ Chicken Slow Cooker

This method delivers tender chicken with a rich, caramelized sauce using minimal active time.

Step 1: Prepare and Season the Chicken

Trim any excess fat from the 2 lb boneless skinless chicken thighs if desired. I place them in the slow cooker in a single layer for even cooking. Season lightly with 1 tsp black pepper and 1 tsp red pepper flakes, which adds a subtle kick without overpowering the other flavors.

This initial seasoning builds a flavor foundation that will develop throughout the cooking process. The thighs will release juices as they cook, which will later combine with the sauce ingredients for maximum flavor infusion.

Step 2: Create the Korean BBQ Sauce

In a medium bowl, whisk together the 0.5 cup soy sauce, 0.5 cup brown sugar, 3 tbsp gochujang, 2 tbsp sesame oil, and 2 tbsp rice vinegar. The brown sugar should be packed to ensure proper caramelization and sweetness balance.

Add the minced 6 cloves garlic cloves and grated 1 tbsp fresh ginger to the mixture. I whisk vigorously until the brown sugar fully dissolves and the sauce becomes smooth and glossy. This sauce will transform into a thick, flavorful glaze as it cooks with the chicken.

Step 3: Combine and Slow Cook

Pour the prepared sauce over the chicken in the slow cooker, ensuring all pieces are well coated. I gently stir to distribute the sauce evenly, making sure some gets underneath the chicken as well.

Cover and cook on low for 4-5 hours or high for 2-3 hours. The chicken is done when it reaches 165°F internally and easily shreds with a fork. The sauce should be bubbling and slightly reduced, with the brown sugar creating a beautiful caramelized sheen.

Step 4: Thicken the Sauce and Finish

Once the chicken is cooked, carefully remove it from the slow cooker and set aside. In a small bowl, mix the 1 tbsp cornstarch with 2 tbsp water to create a smooth slurry.

Stir the slurry into the sauce remaining in the slow cooker. Cook on high for an additional 10-15 minutes until the sauce thickens to a glossy, coat-the-back-of-a-spoon consistency. This step transforms the cooking liquid into a rich, restaurant-quality sauce.

Return the chicken to the slow cooker and toss to coat in the thickened sauce. The chicken should be fully saturated with the glaze, ready to absorb all the developed flavors.

Step 5: Garnish and Serve

Thinly slice the 4 whole green onions and toast the 2 tbsp sesame seeds in a dry pan over medium heat for 1-2 minutes until golden and fragrant. Sprinkle both over the chicken just before serving.

The green onions add a fresh, crisp contrast to the rich chicken, while the toasted sesame seeds provide a nutty crunch. The dish should have a glossy sauce that clings to the tender chicken, with visible caramelization from the brown sugar and gochujang.

Make-Ahead Tips for This Dish

⏰ Week Before

Start by preparing the marinade base to let the flavors meld. In a bowl, whisk together soy sauce, gochujang, brown sugar, garlic, ginger, and sesame oil. Store it in an airtight container in the fridge for up to 5 days. This gives the sauce time to deepen in flavor. Pro tip 💡: Make a double batch of marinade and freeze half for next time! Also, check your pantry for staples like rice vinegar or honey, and pick up any missing ingredients during your weekly grocery run.

🍳 Day Before

Prep the chicken by trimming excess fat and cutting it into even pieces for consistent cooking. Place the chicken in a resealable bag and pour the pre-made marinade over it. Refrigerate for at least 4 hours or overnight to maximize flavor infusion. While the chicken marinates, chop any veggies for sides, like cucumbers or carrots for a quick pickled garnish. Pro tip ✨: Line your slow cooker with a disposable liner for easy cleanup the next day.

🔥 Day Of

Transfer the marinated chicken and sauce to the slow cooker. Add diced onions or other aromatics if using. Cook on low for 4-5 hours or high for 2-3 hours, depending on your schedule. If the sauce thickens too much, add a splash of water or broth. Prepare rice or side dishes while the chicken cooks to streamline your workflow.

🎯 Last-Minute Tasks

Once the chicken is tender, shred or slice it as desired. For a glossy finish, transfer the chicken to a skillet and broil for 3-5 minutes to caramelize the sauce. Garnish with sesame seeds, sliced green onions, and a drizzle of extra gochujang for heat. Serve hot with steamed rice and your prepped sides. Pro tip 🌡️: Keep the slow cooker on “warm” if guests are running late—it holds perfectly!