Make the dipping sauce: In a medium bowl, combine the mayonnaise and mustard. Add the maple syrup, paprika, and salt. Stir until mixed, then transfer the mixture to a half-pint jar and refrigerate for up to 2 weeks.
Brine the chicken: Put the chicken in a bowl, pour the pickle juice on top, and let it sit for at least 5 minutes.
Bread the chicken: Toss the chicken with cornstarch, egg, salt until coated. Coat with panko breadcrumbs mixed with powdered sugar.
Cook the chicken: Fry the breaded chicken pieces in hot oil until golden and fully cooked, about 2-2 ½ minutes. Serve with Heavenly Maple Mustard.
