Natural source of flavanol antioxidants. The natural antioxidants found in teas and certain fruits like berries and grapes can also be found in Hershey's Kisses Brand Special Dark Chocolates. This is good news however, like most indulgent treats, Hersheys Kisses Brand Special Dark Chocolates should be enjoyed in moderation. A serving of Hershey's Kisses Brand Special Dark Chocolates is 9 pieces (41 g) and has 230 calories and 13 g of fat.