Recipe (schema.org)
The schema.org type Recipe is used to mark up cooking and baking recipes in structured form, covering elements such as the ingredient list, preparation steps, nutrition information, preparation time and ratings.
In practice
Recipe matters above all for food blogs and recipe portals, because Google can generate rich snippets from it with an image, timing and star rating. A portal for bread-baking instructions could use it to mark up the proving time, ingredient quantities and difficulty of a sourdough loaf, even though FINK Brot does not publish recipes of its own. The same rule applies here as elsewhere: mark up only content that actually exists, never invented values.