ZipList is officially shut down as of December 10, 2014. This plugin will no longer function nor receive any new updates.
We recommend Easy Recipe Plus as it includes recipe rich pin features alongside being a great recipe plugin replacement.
If you're using the ZipList recipe plugin, your recipe posts already output most of the fields you need for rich pins.
This plugin simply adds any missing Schema.org meta tags and provides a link on each post edit screen to quickly validate all fields with Pinterest.