Preheat oven to 180°C ? Beat butter and sugar in small bowl with electric mixer until smooth, add egg, beat until combined. Stir in sultanas and sifted flour. ? Fold flour, 1 cup cornflakes, sultanas through mixture. ? Roll rounded teaspoons of mixture in lightly crushed cornflakes, place about 3cm apart on greased oven trays; flatten slightly. ? Bake in oven about 20 minutes or until browned. Cool on trays.