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Healthful kale chips are crispy, crunchy treats that are super easy to make at home in the oven.
Gather the ingredients.
Preheat an oven to 300 F.
Trim off and discard the stem ends of the kale leaves. Cut out and discard any large ribs from the center of the leaves (these won't crisp up the same way as the leaves will).
Rinse the leaves clean with cool water and pat them thoroughly dry.
You can leave small leaves whole, but you may want to cut larger leaves into more manageable pieces. Alternatively, you can cut the leaves into largish, yet more chip-like pieces to be eaten in a bite or two.
Put the kale in a very large bowl and drizzle it with the oil. Gently toss the kale pieces until they are thoroughly and evenly coated with the oil.
Arrange the leaves on baking sheets in a single layer (you may need to cook them in batches, but the key to getting the kale crisp is to bake it in a single layer, so resist any temptation to layer the leaves!). Sprinkle the kale with salt. For extra flavor, sprinkle on a dusting of freshly grated Parmesan cheese.
Bake the kale for 20 minutes.
Remove the kale from the oven, and let it cool—you can leave the kale on the baking sheets or transfer it to cooling racks. (Note that the kale "chips" will not be crisp yet, they will crisp up as they cool, so don't leave them in the oven longer.) Repeat with remaining kale, if necessary.
Enjoy the kale chips as soon as they're cool.