01 - Preheat your oven to 300°F. Line two standard baking trays with parchment paper to prevent sticking.
02 - Rinse the kale thoroughly under cool water. Ensure the leaves are completely dry using either a salad spinner or absorbent kitchen towels; residual moisture is critical to achieving a crispy texture.
03 - Place the dried kale pieces into a large mixing bowl. Drizzle evenly with olive oil and sprinkle with sea salt. Gently massage the kale with your hands to ensure every leaf is uniformly coated.
04 - Distribute the seasoned kale in a single layer across the prepared baking trays. It is essential that the leaves do not overlap to allow for even crisping.
05 - Bake for an initial 10 minutes. Rotate the baking trays and continue baking for an additional 5–8 minutes. Monitor closely during this final stage to prevent burning. The kale chips are perfectly done when they are crisp and exhibit lightly browned edges.
06 - Remove the trays from the oven and allow the kale chips to cool for a few minutes before serving. They will crisp further upon cooling.