They're called milk's favorite cookie. But kids and adults like them too and it turns out there's a reason why. A new study says Oreo's can be just as addicting as cocaine. Researchers at the University of Connecticut fed the cookies to rats. The scientists found that when eating Oreo's, the pleasure centers in the rats' brains lit up as much...or even more...than on cocaine. Researchers say more studies need to be done. One other note from the study...researchers say like many humans, the rats also at the filling first.