Reese's Milk Chocolate Peanut Butter Cups. Reese's Pieces: Peanut butter candy in a crunchy shell. Reese's Fast Break: Milk chocolate, peanut butter & nougats. Reese's Peanut Butter Cups: 240 calories per serving. Reese's Pieces: 210 calories per serving. Reese's Fastbreak: 170 calories per servings. Partially produced with genetic engineering. For more about GMO ingredients visit SharingWhatsInside.com. Gluten free. Questions or comments? www.askhersheys.com or 800-468-1714. Visit us at www.Celebratewithhersheys.com. Assortment may vary.