Prep the zucchini. Wash and dry the zucchini well.
Slice into thin, even rounds (about 1/8–1/4 inch). Thinner slices crisp more, but avoid paper-thin slices that burn quickly.
Pat them dry. Lay slices on a clean towel and blot with paper towels. Removing surface moisture helps the coating stick and promotes crisping.
Set up two bowls. In one bowl, beat the egg.
In another, mix Parmesan, breadcrumbs, garlic powder, paprika, pepper, and salt.
Coat the slices. Dip each zucchini round into the egg, let excess drip off, then press into the Parmesan-breadcrumb mix. Place coated slices on a parchment-lined baking sheet. Drizzle or lightly brush with 1 tablespoon olive oil.
Bake option. Preheat the oven to 425°F (220°C).
Bake for 12–16 minutes, flipping halfway. Add the remaining oil after flipping if needed. They’re done when golden brown and crisp at the edges.
Air fryer option. Preheat to 400°F (200°C).
Arrange chips in a single layer. Air fry 6–9 minutes, flipping halfway, until crisp and golden. Work in batches to avoid overcrowding.
Season and serve. Sprinkle lightly with salt right out of the oven/air fryer.
Serve warm with your favorite dip.