If you've cooked chicken and it turned out tough, there are a few methods you can try to make it tender again. Here are some techniques that can help:

1. Slice or Shred: If the chicken is tough, slicing or shredding it can help break up the fibers and make it easier to chew [1].

2. Marinade: Consider marinating the cooked chicken in a mixture of oil, acid (such as lemon juice or vinegar), and seasonings. This can help tenderize the meat. You can marinate the chicken for a few hours or overnight in the refrigerator [1].

3. Pounding: If you have boneless chicken breasts or deboned thighs, you can try pounding them with a meat hammer or tenderizing tool. This process breaks the fibers in the chicken, allowing for faster cooking and tenderness. Make sure to cover or wrap the chicken in plastic wrap or a sealable bag to prevent the juices from escaping [2].

4. Slow Cooking: Another method to achieve tender chicken is to slow cook it. This allows the meat to cook slowly and become tender. You can use a food smoker or cook the chicken in a slow cooker or oven at a low temperature. Just be careful not to overcook the chicken, as it can become dry [2].

Learn more:

1. How to make my chicken tender after I've cooked it and it's tough
2. The Right Way To Tenderize Chicken | Bradley Smoker
3. Will cooking chicken longer in soup make it less tough and stringy? - Seasoned Advice