A buckeye is a small, shiny brown nut with a tan spot on the top that comes from the official state tree of Ohio, called the buckeye tree. The buckeye candy is made to look similar to the nut, with a peanut butter filling and chocolate coating. These peanut butter balls are similar in ingredients, but are different in the fact that these are completely coated in chocolate, rather than leaving a little of the peanut butter filling exposed.