In a bowl, mix flour, cornstarch, milk powder, and salt

Cream butter and icing sugar until pale and fluffy

Sift in dry ingredients into butter mixture, and add in vanilla essence

Scoop per 1 tbsp, shape into nice rounds/balls, and bake cookies for 20-25 minutes on preheated 300 F

Roll cookies freshly out of the oven in icing sugar. Once cookies are at room temperature, roll them once more in icing sugar