Prep pickles: Drain pickle slices and spread on paper towels. Pat both sides dry until surface moisture is removed. For best results, chill for 10–15 minutes uncovered to help firm them.
Preheat air fryer: Preheat the air fryer to 375°F (190°C) for 3–5 minutes. Preheating helps the crust set quickly and reduces sloughing.
Set up breading station: Arrange three shallow bowls/plates:
Bowl A: flour (lightly season with a pinch of salt)
Bowl B: eggs + milk + Dijon (beat until smooth)
Bowl C: panko + paprika + garlic powder + onion powder + cayenne (if using) + salt + pepper
Dredge: One by one, dredge each pickle slice in flour (shake off excess). Dip into the egg mixture, letting excess drip off. Press into the panko mixture, coating both sides thoroughly. For an extra-crispy double crust, dip back into the egg wash briefly and press into panko again.
Rest breaded pickles: Place coated pickles on a wire rack or sheet pan and let rest for 5–10 minutes. This helps the coating adhere and reduces flaking during cooking.
Spritz with oil: Lightly mist both sides of the breaded pickles with an oil spray — a fine, even coat is enough. Avoid heavy dousing.
Air fry in single layer: Arrange pickles in a single layer in the preheated air fryer basket with small gaps between each. Work in batches to avoid overcrowding.
Cook: Air fry at 375°F (190°C) for 6–9 minutes total, flipping once around the halfway point (3–4 minutes). Cook until deep golden-brown and crisp at the edges. Thicker spears or slices may need 10–12 minutes.
Rest & serve: Transfer cooked pickles to a wire rack for 1–2 minutes to firm up. Serve hot with your choice of dipping sauces (classic ranch, spicy remoulade, or sriracha-yogurt).