Preheat your oven to 225°F (110°C). Wash the zucchinis and slice them thinly into even rounds. You can use a mandoline slicer or a sharp knife to get consistent slices.
Lay the zucchini slices on a paper towel or clean kitchen towel to absorb excess moisture.
In a bowl, drizzle some olive oil over the zucchini slices and toss them gently to coat them evenly. Season the zucchini with salt, pepper, and any other desired seasonings.
Place the seasoned zucchini slices in a single layer on a baking sheet lined with parchment paper. Bake slices for 1,5 to 2 hours, flipping them halfway through, until they become crispy and lightly browned. Keep an eye on the chips to prevent them from burning.
Once the zucchini chips are crispy and golden, remove them from the oven and let them cool slightly. Serve the zucchini chips immediately as a tasty and healthier snack option.