> Food bloggers know that recipe-searchers are there to drop in, get an ingredient list, and move on.

This is not entirely true, though. If a randomly found recipe turns out particularly good, I'll bookmark the site and try out other dishes. It's a very practical method to find particularly good* recipe collections.

*) In this case "good" means what you need - not just subjectively "tasty", but e.g. low cost, quick to prepare, low calorie or in line with a particular diet and so on.