Cream butter and gradually add sugar and beat until fluffy. Add egg yolk, brandy and vanilla. Beat again until very light. Stir in almonds.
Blend in flour mixture, mix to form a soft, smooth dough. Chill 30 minutes or until it can be handled easily.
Preheat oven to 170 degrees C.
Shape level tablespoonfuls of dough into crescent-shapes. Place 2cm apart on ungreased baking tray. Insert a whole clove into center of each biscuit. Bake for 25-30 minutes or until light...do not brown. Cool on rack. Dust generously with icing sugar.