Vanilla cookies

Name: Vanilla cookies
Prep time: 1 h 20 min
Cook time: 20 min
Total time: 1 h 40 min
Yield: 7
Cuisine: En
Ingredients: 90g butter; 40g icing sugar (or for taste); 130g plain flour (sifted); 1 tbsp corn flour (sifted); 1 1/2 tbsp vanilla essence; 3/4 tbsp milk; 2 tbsp icing sugar (for dusting, keep aside); 1 tbsp plain flour (to dip fork over)