Preheat oven to 350 degrees. Line two cookie sheets with parchment paper.
Wash the kale and remove the ribs. Tear the leaves into chip sized pieces, and lay on a paper towel to drain, or run them through the salad spinner.
Place the dry kale leaves in a large bowl and add the olive oil, nutritional yeast, onion powder, and garlic powder. Use your hands to mix, making sure each leaf gets some of the coating on it.
Spread kale in a single layer on the cookie sheets, making sure that they are spread out without touching.
Bake at 350 degrees for 9-12 minutes. Check on them periodically so they don't burn. When they are crisp, remove from the oven and sprinkle with salt. Let cool for a few minutes before eating.
Notes
If your head of kale is really big, you may need more of the other ingredients.Be sure to leave some space between the kale chips, so that they bake up evenly.