Make these delicate wafers one pan at a time so you can roll them while they are warm.
To make this recipe as seen on "Martha Bakes," combine chocolate and 2 teaspoons vegetable oil in a double boiler over simmering water; stir occasionally with a rubber spatula until smooth. Let cool slightly. Dip about 2 inches of each cooled cookie into chocolate. Roll dipped edge in finely chopped toasted nuts, if desired. Place on a wire rack, with dipped section off the edge, to dry.