Combine chicken, wine, prunes, olive oil, vinegar, capers and liquid, brown sugar, oregano, parsley, olives, garlic, bay leaves, salt, and black pepper in a large bowl. Transfer into 2 resealable plastic bags; marinate in the refrigerator for 12 to 24 hours, the longer the better.
STEP 2
Preheat the oven to 325 degrees F (165 degrees C).
STEP 3
Pour chicken and marinade into a 9x13-inch baking pan.
STEP 4
Bake in the preheated oven until chicken is no longer pink in the center and juices run clear, about 40 minutes. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).