Preheat your oven to 275°F. This lower temperature ensures the kale chips dry out and crisp up without burning. I always double-check my oven temperature to keep them evenly crispy.
Remove the tough ribs from the kale and tear the leaves into roughly 1 1/2-inch pieces. I like to handle them gently so the leaves don’t tear too much, keeping them in nice bite-sized portions.
Place the kale in a mixing bowl, drizzle with olive oil, and sprinkle lightly with sea salt. Use your hands to massage the oil into each leaf so every piece is lightly coated for even crisping.
Spread the kale leaves in a single layer on a baking sheet. Overlapping can cause some chips to steam instead of crisp. I always use two sheets if needed to avoid crowding.
Bake for about 20 minutes, turning the leaves halfway through with tongs or a spatula. I keep an eye on them during the last few minutes to prevent burning while ensuring they stay crisp.
Once baked, let the kale chips cool slightly on the sheet. They crisp up even more as they cool. I usually enjoy a few immediately while still warm—they’re irresistible!