Nabisco Treat is a popular snack made by Nabisco, a company that produces many different types of snacks. The term 'Nabisco Treat' can refer to a variety of snacks, including Oreo cookies, which is a four-letter word that can be used to solve the crossword puzzle. Oreo cookies are a type of sandwich cookie consisting of two chocolate wafers with a sweet cream filling in between. They have been a popular snack since their introduction in 1912 and remain a favorite today.