A recipe can not be protected by copyright. This is one of the reasons that online recipe pages have turned in to long personal stories with (incidentally) a recipe at the bottom.
A recipe book, however, does have protection -- due to the creative work found in organizing the recipes, choosing which ones to include and to out near each other, and any creative work associated with introductions, photos, or other new expression.
That means that legally, you could buy a ton of recipe books, and then make your own by copying and pasting just the ones you like. You could use the recipes unchanged, but you can't reuse the photos or any descriptive text, or anything but the bare recipe.
Similar logic should apply to the publication or reuse of bare facts.
Of course, law is complicated and nuanced, and lawyers/judges/legislators don't always understand new technology well enough to apply existing principles properly to new worlds