Granulated Sugar Icing

- from Mom H's friend in Tonga, Marilyn Felt -

1/4 lb (1 cube) margarine (or butter) 

(or? 8 tbsp shortening)
½ C milk
1 t vanilla
1 C sugar
3 T flour

Cream the butter and the sugar.  Add flour one tbsp at a time.  Add the milk and the vanilla.  Beat VERY WELL with electric mixer.