Needs community tagging of recipes. The recipe of the day is vegan and vegetarian, but has neither tag (both of which already exist: http://cooking.nytimes.com/tag/vegan). No doubt this problem exists for other tags and other recipies in the database.

Edit: A cursory search through the BBC's recipe database shows their tags to be notably more thorough, though at times mistaken (butter labeled vegan in http://www.bbc.co.uk/food/recipes/sugar_and_spice_67172) and unfortunately just as immutable at the NYT site.