There are two points of relevance here, I think. The first is that yours is one way of consuming recipes, but another is to simply look for news recipe in diffe

There are two points of relevance here, I think. The first is that yours is one way of consuming recipes, but another is to simply look for news recipe in different cookbooks or, increasingly often, find one at a random food blog. The second is that even collections are very much possible on a wiki, or even outside it, by just compiling links to the wiki articles. For example, I enjoy cookbooks written about a single cuisine (e.g. listing all kinds of Middle Eastern recipes together), because they will then often go well together. One could easily imagine a Wikibooks page compiling related recipes into a recommendation list.