Kai yang is Thailand’s beloved street-food grilled chicken, marinated in a fragrant blend of lemongrass, cilantro root, garlic, and fish sauce, then grilled until the skin is charred and crisp. This version, inspired by the version served at the University of Surrey’s Thai food stalls, brings that same bold, savory-sweet flavor to your home grill or oven. It works because the marinade does double duty—tenderizing the meat while building a deeply caramelized, aromatic crust.
Ingredients
- 4 bone-in, skin-on chicken leg quarters (about 2.5 lb / 1.1 kg total)
- 3 stalks lemongrass, bottom 4 inches only, thinly sliced
- 4 cloves garlic, peeled
- 1 cup (20 g) fresh cilantro roots or stems, chopped (if unavailable, use 1/2 cup / 10 g cilantro leaves plus 1 teaspoon ground coriander)
- 1 tablespoon (15 ml) white peppercorns
- 1/4 cup (60 ml) fish sauce
- 2 tablespoons (30 ml) soy sauce
- 2 tablespoons (30 g) palm sugar or brown sugar
- 1 teaspoon (5 ml) turmeric powder
- 1/2 cup (120 ml) coconut milk (for basting)
Instructions
- Make the marinade: In a mortar and pestle or food processor, pound or blend the lemongrass, garlic, cilantro roots, and white peppercorns into a coarse paste. Add the fish sauce, soy sauce, palm sugar, and turmeric; blend again until smooth.
- Pat the chicken leg quarters dry with paper towels. Using a sharp knife, make 2–3 shallow slashes through the skin and into the meat on each piece. This helps the marinade penetrate and ensures even cooking.
- Place the chicken in a large bowl or resealable bag. Pour the marinade over it, massaging it into the slashes and under the skin where possible. Cover and refrigerate for at least 2 hours, or up to 24 hours for deeper flavor.
- About 30 minutes before cooking, remove the chicken from the fridge to let it come to room temperature. Meanwhile, preheat your grill to medium-high (about 375°F / 190°C). If using an oven, preheat to 400°F (200°C).
- If grilling: Place the chicken skin-side down on the grill grates. Cook for 10–12 minutes, then flip. Continue grilling, turning every 8–10 minutes, until the skin is charred in spots and the internal temperature reaches 165°F (74°C) as measured by a food thermometer inserted into the thickest part of the thigh, avoiding bone. This typically takes 30–35 minutes total.
- If oven-roasting: Place the chicken on a wire rack set over a baking sheet. Roast for 35–40 minutes, flipping once halfway, until the skin is browned and the internal temperature reaches 165°F (74°C). For extra char, broil for the last 2–3 minutes, watching closely.
- During the last 10 minutes of cooking, brush the chicken with coconut milk. This creates a glossy, lightly sweet glaze. Continue cooking until the temperature is reached.
- Remove from heat and let rest for 5 minutes before serving. The resting time allows juices to redistribute.
Tips
- If you can’t find cilantro roots, use the stems—they have similar flavor. Or substitute with a handful of cilantro leaves plus a pinch of ground coriander; the taste will be slightly less intense but still good.
- For the most authentic flavor, use a mortar and pestle rather than a food processor—it releases more essential oils from the lemongrass and garlic. If using a food processor, scrape down the sides often.
- Don’t skip the slashes. They allow the marinade to flavor the meat deeply and help the chicken cook evenly, preventing undercooked spots near the bone.
- If using bamboo skewers (for a street-food style), soak them in water for 30 minutes first to prevent burning. But for this recipe, bone-in pieces work best.
Serving Suggestions
Serve kai yang with steamed jasmine rice and a spicy dipping sauce called nam jim jaew—a tangy blend of lime juice, fish sauce, chili flakes, and toasted rice powder. Add a fresh cucumber salad or som tam (green papaya salad) for a complete Thai meal. The chicken also pairs well with sticky rice and a simple plate of raw vegetables like cabbage and green beans.
Variations
- Oven-baked version: If you don’t have a grill, the oven method above works beautifully. For a smokier flavor, add a teaspoon of liquid smoke to the marinade.
- Chicken wings: Use 2 lb (900 g) of chicken wings instead of leg quarters. Reduce cooking time to 20–25 minutes, and adjust the marinade quantity slightly—you may have a little extra.
- Spicy kai yang: Add 2–3 fresh bird’s eye chilies (or 1 teaspoon chili flakes) to the marinade for heat. This is common in some regions of Thailand.
- Pork version (kai yang moo): Substitute pork shoulder steaks or pork chops. Cook to 145°F (63°C) with a 3-minute rest, per USDA FSIS guidelines.
Storage and Reheating
Leftover kai yang can be refrigerated in an airtight container for up to 3 days. To reheat, place the chicken in a 350°F (175°C) oven for 10–15 minutes, or until heated through to 165°F (74°C). You can also reheat in a microwave, but the skin will lose its crispness. For best results, reheat in a skillet over medium heat with a splash of water, covered, for 5–7 minutes, then uncover and crisp the skin for 2 minutes.
Frequently Asked Questions
Can I use boneless, skinless chicken thighs? Yes, but reduce cooking time to 20–25 minutes. The skin helps retain moisture, so consider adding a little oil to the marinade if using skinless.
What if I don’t have lemongrass? Use 1 tablespoon of lemongrass paste (often sold in tubes) or substitute with 1 teaspoon of grated lemon zest plus 1/2 teaspoon of dried lemongrass. The flavor won’t be as bright, but it will still be aromatic.
Is it necessary to use coconut milk for basting? No, but it adds a subtle sweetness and helps the skin brown. You can skip it or use a mixture of honey and water instead.
Can I marinate the chicken for too long? Yes, more than 24 hours can make the texture mushy due to the enzymes in the marinade. Stick to 2–24 hours.
How do I know when the chicken is done without a thermometer? The juices should run clear when pierced, and the meat should pull away from the bone easily. However, a thermometer is the only reliable way to ensure safety—insert it into the thickest part of the thigh and look for 165°F (74°C).
Can I freeze the marinated chicken? Absolutely. Place the chicken and marinade in a freezer-safe bag, press out air, and freeze for up to 3 months. Thaw overnight in the refrigerator before grilling.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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