Combine Greek yogurt, mayonnaise, jalapeño brine liquid, salt, garlic powder, and black pepper in a large bowl. Whisk to combine.
Add chicken breast, onion, celery, pickled jalapeños and fresh jalapeños to the bowl and combine with dressing until fully mixed.
Notes
Hot peppers vary in spice level, so start with 1/2 of a jalapeño pepper to adjust for heat.To save time, use a rotisserie chicken.Feel free to use all mayonnaise instead of Greek yogurt, or all Greek yogurt and no mayo!