You need to request permission from the recipe creators to reprint their recipes.
Most people are amenable to this and will usually have some sort of stipulation that you provide a link back to their web site or include a small bit of information about them - sometimes referred to as a by-line.
Some people would rather ask for forgiveness than ask for permission - that's not a good rule of thumb to follow here...or anytime, really.
Question added to topic Starting a Business • June 14, 2007
How do I get recipes that I can feature on my site without having to worry about copyright infringement?
I want to feature food and drink recipes on my urban web magazine. The problem is, I don't know where I can get food and drink recipes for the magazine without worrying about copyright infringement. I usually copy recipes off of other sites, but could this get me into trouble?