When recipe information is marked up in web pages, Google may use that information to show rich snippets for recipe results, and for inclusion in Google with Recipe View. (Recipe View is currently available only in the US and Japan, but we are working to bring it everywhere.)
The goal of a recipe rich snippet is to provide users with additional information about a specific cooking recipe, such as the reviewer(s) star ratings (1 to 5 stars), cook/prep time, and calorie information.
The following guidelines apply to recipe snippets:
When using recipe markup, the main topic of the page needs to be about a specific recipe. Using recipe markup on a page containing multiple recipes is not supported.
If the recipe markup contains a single review, the reviewer’s name needs to be a valid name (Person or Organization). For example, "50% off ingredients" is not a valid name for a reviewer.