The twin bing is a candy bar made by the palmer candy company of sioux city, iowa. it consists of two round, chewy, cherry-flavored nougats coated with a mixture of chopped peanuts and chocolate. the company also produces individual bings, as well as the king bing, a package of three. the twin bing was introduced in the 1960s, possibly in 1969, according to marty palmer, the 5th-generation president of the palmer candy company, and has been called "one of sioux city's quintessential treats".

Source: Wikipedia