Preheat the oven to 425°F (220°C).
Slice the zucchinis into thin rounds.
In a bowl, mix the Parmesan cheese, garlic powder, onion powder, salt, and black pepper.
Drizzle the olive oil over the zucchini slices and toss to coat.
Sprinkle the cheese mixture over the zucchini slices, ensuring they are evenly coated.
Place the zucchini slices on a baking sheet lined with parchment paper in a single layer.
Bake for 20-25 minutes or until golden brown and crispy.
Remove from the oven and let cool slightly before serving.