Preheat the oven to 180°C
In a bowl cream the butter and icing sugar
Add sifted flour and Custard powder mix it until combined in smooth mixture
U can make a ball n lightly press with fork or u can press this in cookie presser too (i used cookie presser)
Place on greased parchment paper leave 1 inch gap between each cookies it will expand .
Bake for 18-20 mints
After bake remove immediately in to a wire rack leave it to cool completely
It may look soft but later after cool it will become crunchy