Preheat the oven to 150°C/300°F/Gas mark 2
Sift together the flour, cornflour and icing sugar/confectioner's sugar. Mix in the butter. Stir in the walnuts. Use a little water or milk if the dough is too dry.
Drop by teaspoons onto a baking sheet. Bake until the cookies are lightly golden, 20 to 25 minutes. Cool on racks.
