In large bowl, stir cookie mix, flour, softened butter and egg with spoon until soft dough forms. Shape dough into 20 (1 1/2-inch) balls. Flatten each ball to 2 1/2-inch circle. Press 1 chocolate into center of each cookie, making sure to form dough around chocolate to enclose; reshape into balls. Roll in remaining sugar-cinnamon mixture. Place 2 inches apart on ungreased large cookie sheets. Discard sugar-cinnamon mixture after rolling balls.