In food processor, turn peanuts, oil, water, onion, garlic, candlenuts into fine paste. Pour into a pan, and add kaffir lime leaves, more water, and sugar. Season mixture with chicken bouillon powder and sweet soy sauce. Let cool to room temperature.

In a large bowl, place chicken thighs, pour some of the peanut sauce, and drizzle with sweet soy sauce. Coat evenly and marinade for at least 30 mins

Grill chicken until cooked through and serve with peanut sauce.