Jennifer Slegg spotted this test on Bing this morning and shared a few screen shots of it in action. We cannot replicate this on our end yet.
These special snippets are likely coming from the recipe schema markup deployed by this web site.
Bing is probably testing to see if searchers like the interface in the search results or if they prefer to click through to the main search results.
Google has also done a lot around recipes in the search results in the past and has also tested showing schema data directly in the snippets.
