Well, as the tag wiki excerpt says:
Helper tag for finding questions that need to be closed. Read the FAQ for more details.
In our heyday we had a lot of terrible, terrible tags; including some that dominated the entire site like
[cooking-techniques]. We've successfully purged those and made major dents in several other clunkers like ingredients and health, but there are still many more that remain.
recipe is one that we've never given a whole lot of priority to because most questions with that tag should be closed and/or deleted rather than simply retagged. And the question count is low (compared to some of the aforementioned tags in the past).
Unfortunately, like all bad tags, it sits there festering in the system and people continue to use it despite the "DON'T USE THIS" tag wiki.
Please do get rid of the recipe tag for questions that are actually salvageable; for questions that are in fact recipe requests, just vote to close (or flag, for those without the necessary reputation). We (the moderators) will happily finish the job for any obvious recipe requests. Please don't bump those questions with retags; we want them to quietly die and be forgotten, not be revived.
Standard disclaimers apply about retagging too many questions at once. Try not to do more than 5-10 a day and be mindful of other people doing the same thing.