Step 1

Place chicken thighs, peppercorns, garlic, bay leaves, soy sauce, and vinegar into the bottom of a slow cooker in that order, making sure peppercorns and bay leaves are submerged into the liquid.

Step 2

Cover and cook on High until chicken thighs are no longer pink in the centers, about 5 hours. An instant-read thermometer inserted near the bone of a thigh should read 165 degrees F (74 degrees C).