Preheat oven to 180°C (160°C fan-forced).
Beat butter and sugar in small bowl with electric mixer until smooth, add egg, beat until combined.
Stir in sultanas and sifted flour.
Roll rounded teaspoons of mixture in Corn Flakes, place about 3cm apart on greased oven trays; flatten slightly.
Bake in oven about 20 minutes or until lightly browned. Cool on trays.