Reese's is a popular American candy brand owned by The Hershey Company. It is best known for its iconic peanut butter cups, but also produces a variety of other chocolate and peanut butter products. Reese's Pieces are a candy product made up of small, round, crunchy pieces of peanut butter-flavored candy coated in a colorful candy shell. They were first introduced in 1978 and have become a popular snack food.