The term 'DOUBLESTUF COOKIE' refers to a type of Oreo cookie that is made with double the amount of creme filling compared to the original Oreo. The term 'OREO' is a 4-letter crossword solution for this term. Oreos are a popular brand of sandwich cookie that consists of two chocolate wafers with a sweet creme filling in between. The Double Stuf Oreo was introduced in 1974 and has become a favorite among Oreo fans.