Preheat oven to 350° with racks in top and bottom thirds. Line two baking sheets with parchment paper.
Cut ends off parsnips. Using a mandoline, slice parsnips very thinly, about the thickness of a dime.
Toss parsnip slices with oil and salt, then arrange in a single layer on prepared baking sheets.
Take parsnip slices on top and bottom racks, ⏰ 20 minutes. Flip chips and rotate baking sheets. Bake chips about ⏰ 10 minutes more, removing chips as they crisp and darken in color. Transfer baking sheets to cooling racks. Chips will continue to crisp as they cool.
Recipe from: Cuisine At Home - https://www.cuisineathome.com/recipes/appetizers-snacks/baked-parsnip-chips/