Many of the kale chips you buy in the store are super expensive. My local grocery store sells a popular brand of kale chip for $6.99 a package! For $1, you can buy a bunch of kale and make your own.
I know many cooks prefer to use a dehydrator for kale chips. I don't have one of those. Maybe someday I'll purchase one just for kale chips. For now, I make them in my oven.
I preheat the oven to 375. I wash, de-stem, and rough chop a bunch of kale. I leave the pieces pretty big. I also let some water stay on the kale after washing. This evaporates in the oven, and the steam helps cook the kale. I put the kale on a baking sheet:
Remove from the oven and enjoy!