Prep the Zucchini: Start by washing the zucchinis and cutting off the ends. Slice them into thin rounds, about 0.25 inch thick. Place the zucchini slices on a clean kitchen towel and sprinkle lightly with salt. Let them sit for about 10 minutes to draw out excess moisture. Pat them dry with paper towels afterward.
Prepare the Breading Station: In a shallow bowl, whisk the egg with olive oil until well combined. In a separate bowl, mix together the breadcrumbs, grated Parmesan cheese, garlic powder, onion powder, smoked paprika, salt, and pepper.
Coat the Zucchini Slices: Dip each zucchini slice first into the egg mixture, letting any excess drip off. Then, generously coat it with the breadcrumb mixture, pressing it slightly to adhere.
Preheat the Air Fryer: Preheat your air fryer to 375°F (190°C) for about 5 minutes.
Arrange and Spray: Spray the air fryer basket with cooking spray. Lay the coated zucchini slices in a single layer in the basket (you may need to do this in batches to avoid overcrowding) and then spray the tops lightly with more cooking spray for added crispiness.
Air Fry the Chips: Cook the zucchini chips in the air fryer for about 11.0 minutes, flipping halfway through, until they are golden brown and crispy.
Cool and Serve: Once cooked, remove the zucchini chips and let them cool slightly on a rack. They will continue to crisp up as they cool. Serve warm as a snack or side dish with your favorite dipping sauce!