1.Preheat oven to 180°C/160°C fan-forced. Lightly greased oven trays.
2.Beat butter, peanut butter, sugar and egg in small bowl with electric mixer until well combined. Transfer mixture to large bowl; stir in sifted dry ingredients and nuts.
3.Roll rounded teaspoons of mixture into balls with lightly floured hands. Place about 3cm apart on oven trays; flatten slightly with hand.
4.Bake about 12 minutes or until browned lightly; cool on trays.