Oreos could be even more addictive than cocaine, at least to cookie-loving lab rats. (But just like most sensible humans, rats go for the middle first.)
Flickr/williac Cookie crack
In a study designed to shed light on the potential addictiveness of high-fat/high-sugar foods, Connecticut College Professor Joseph Schroeder and his students found rats formed an equally strong association between the pleasurable effects of eating Oreos and a specific environment as they did between cocaine or morphine and a specific environment.
They also found that eating the cookies activated even more neurons in the brain's "pleasure center" than exposure to cocaine or morphine.