Beat butter and sugar till white and creamy.

Add in egg yolks, vanilla and salt and beat to combine

Add corn flour and slowly add flour to make a soft dough(u may need more or less than 4 cups depending on the weather)

Roll logs in wax paper and refrigerate for at least half an hour.

Slice and Bake at 180° for 16-20 mins till pinkish in colour.. Allow to cool completely..

In a small bowl, whisk icing sugar, lemon juice and zest until it forms a thick but pourable glaze.. (add more lemon juice if necessary..

Dip the top of each cookie in glaze and let set