Place the chicken breast halves in a zip-lock bag with pickle juice and water. Refrigerate for at least 30 minutes. This step keeps the meat juicy and gives it that signature tangy flavor. Don’t skip this part—it’s key to recreating the original taste.
In one bowl, whisk together milk and egg. In another, combine flour, powdered sugar, paprika, pepper, chili powder, salt, baking powder, and cayenne (if using). This double bowl system will create that crispy double coating.
Remove the marinated chicken and pat it dry with a paper towel. Dip each piece into the egg wash, then coat it in the flour mix. Repeat this one more time—egg wash, then flour. That double dip is what gives you the crunchiest crust possible.
Heat oil in a large skillet or deep fryer to 350°F. Fry each chicken piece for 3–4 minutes on each side until golden brown and cooked through. Place the chicken on a wire rack or paper towel to drain any extra oil.
Lightly toast your buns. Spread the homemade sauce on both sides, then layer on the crispy chicken, cheese, lettuce, tomato, and pickles. Press lightly to hold everything together and serve warm.