What did they used to put in smarties?

Originally, Smarties contained a mix of sugar, corn syrup, and various flavorings, and were coated with a colorful candy shell. In some regions, they also included chocolate as a filling. However, in the U.S., Smarties are a type of tablet candy that is primarily made of dextrose and flavored with fruit essences, while the chocolate-filled version is known as "Rockets" in Canada. Over the years, the formulations have evolved to meet consumer preferences and dietary guidelines.