Pin Custom Image
You get the “Pin Recipe” button in the free version as well, but it’s limited to pinning whatever you’ve set as the recipe image.
With the Premium plugin you now also have the ability to set a custom pin image to be used instead, allowing you to optimize for Pinterest.
Make sure to enable this option on the WP Recipe Maker > Settings > Social Sharing page first.
When creating/editing a recipe you'll have the option to set a specific image for the pin button: