1. Slice the squash as thin as you can. 2. Spray a cookie sheet liberally with cooking spray. Then line the squash slices up on the cookie sheets, ensuring that they don’t touch Preheat the oven to 200 degrees. 3. Sprinkle salt over the squash slices. At this point, sprinkle whatever else you want on the chips right now too. 4. Put the cookie sheets into the oven. Let the squash chips bake for 2-3 hours The longer you bake them the crunchier they will be.