Reese's Pieces, a popular candy product by Hershey, debuted in 1978 as an extension of the beloved Reese's Peanut Butter Cups. Initially envisioned as a chocolate-coated product, manufacturing challenges led to the final version featuring a candy shell similar to M&M's but with a peanut butter filling. Reese's Pieces gained significant popularity in the early 1980s, notably boosted by their prominent placement in the 1982 blockbuster film "E.T. the Extra-Terrestrial," which sparked a surge in sales and cultural relevance. This success solidified Reese's Pieces as a staple in the American confectionery market, celebrated for their unique combination of a crunchy shell and creamy peanut butter center.