Preheat your oven to 350°F (175°C). This temperature allows the kale to crisp up nicely without burning.
Wash the kale leaves thoroughly under cold water to remove any dirt or grit. After washing, dry them completely using a salad spinner or by gently patting them with a clean kitchen towel.
Remove the tough stems and tear the kale leaves into bite-sized pieces, about 3 inches in size. Try to keep the pieces as uniform as possible to ensure even cooking.
In a large mixing bowl, toss the kale pieces with 2 tablespoons of olive oil. Make sure every leaf is lightly coated. Season with salt and freshly ground black pepper according to your taste.
Spread the seasoned kale evenly on a baking sheet. Avoid overcrowding the pan, as this can lead to steaming instead of crisping. If necessary, use two baking sheets.
Place the baking sheet in the preheated oven and bake for 10 to 15 minutes, or until the kale is crispy and slightly golden. Check them halfway through and toss the leaves gently to promote even baking.
Once baked, remove the kale chips from the oven and let them cool on the baking sheet for a few minutes. They will continue to crisp up as they cool. Serve immediately or store in an airtight container for later.