Prep the chicken. Chop or shred cooked chicken into bite-size pieces.
Aim for even chunks so every bite gets dressing and crunch.
Chop the mix-ins. Finely dice dill pickles, celery, and red onion. The smaller the dice, the better the texture and distribution.
Make the dressing. In a large bowl, whisk together mayonnaise, Greek yogurt, pickle juice, Dijon, garlic powder, onion powder, and a few cracks of pepper. It should be creamy but pourable.
Adjust with more pickle juice for extra tang.
Fold it together. Add chicken, pickles, celery, red onion, and fresh dill to the bowl. Gently fold until everything is well coated without mashing the chicken.
Taste and season. Add salt only after mixing—pickles and pickle juice can be quite salty. Finish with more pepper or a fresh squeeze of lemon if you want extra brightness.
Chill for best flavor. Cover and refrigerate for at least 30 minutes.
The flavors meld and the texture firms up nicely.
Serve your way. Spoon onto toasted sourdough, stuff into lettuce cups, wrap in a tortilla, or scoop over mixed greens. Add cheddar or bacon on top if you like it extra indulgent.