01 - Set up three shallow bowls: add flour to one, whisk eggs and milk in the second, and combine panko, grated Parmesan, garlic powder, paprika, salt, and black pepper in the third.
02 - Dredge each zucchini stick in flour, dip in the egg mixture, then fully coat with the panko-Parmesan mixture, pressing to ensure even coverage.
03 - Preheat air fryer to 400°F for 3 minutes.
04 - Place breaded zucchini sticks in a single layer in the air fryer basket. Work in batches if necessary to prevent overcrowding.
05 - Air fry zucchini fries for 8 to 10 minutes, flipping halfway, until golden brown and crisp.
06 - Serve immediately while hot with marinara, ranch, or garlic aioli for dipping.