Sift the flour and salt on to a square of greaseproof paper and set aside. Cream the butter, sugar and finely grated orange rind until soft and light. Lightly mix the eggs and beat into the mixture a little at a time, adding a little of the flour along with the last few additions. Using a metal spoon, fold in the remaining flour and a little milk to make a soft dropping consistency.
Spoon the mixture into a greased and lined
Meanwhile put the strained orange juice in a saucepan and add the icing sugar. Set in a warm place or heat gently so that the sugar dissolves in the orange juice. Prick the hot cake layer all over with a fine skewer and spoon the hot orange syrup over the entire surface. It will appear at first that there is almost too much juice, but the cake will soak it all up. Leave until quite cold.
Loosen the sides and remove the cake carefully from the tin. Dust generously with icing sugar and serve.