Place the kale on the baking sheet, in a single layer. Here is a very important tip. Do not place the kale on top of each other. If you create a double layer of kale, the kale chips will not have the same crunchy texture as a potato chip. If you’re making more than 1-2 servings, use two baking sheets.
Note: to ensure the oil and salt evenly covers the kale chips, you can also mix the kale, olive oil, and salt together in a bowl, before adding to the baking sheet.