The Oreo cookie is a champion.  Although not the original sandwich cookie, milk's friend has dominated the dunking game for more than 107 years.  For the longest time, America's favorite cookie has delivered the cookie goodness in the form of the classic chocolate wafers on either side of a delicious white creme.  Starting in 1974 with the "Big Stuff," the most popular cookie in the land has branched out into lots of different flavor combinations.  As with musical artists, reinventing itself has proven to be the key to longevity for this sweet treat.