Preheat oven to 350 degrees F.
Wash and dry kale leaves. Using a knife, separate the green kale leaves from the thick ribs, and discard the ribs. Cut or tear the kale leaves into your desired size of chips, knowing that they will shrink a bit while baking.
Combine the kale leaves, vinegar, oil and 1/4 teaspoon of salt in a large bowl. Then use your hands to toss and massage the kale for 1-2 minutes until it is soft and slightly darker.
Spread out the kale in a single layer on a parchment-covered baking sheet (or two). Then sprinkle on the remaining salt. Bake for 7-10 minutes, or until the kale is crunchy and no longer soft. Remove and serve immediately, or store in a sealed container for up to 1 week.
