Makes enough to fill and cover one 20 cm / 8 in cake
100g/4 oz white chocolate
100 g/4 oz butter or margarine, softened
225 g/8 oz icing (confectioners') sugar, sifted
15 ml/1 tbsp milk
Melt the chocolate in a heatproof bowl
set over a pan of gently simmering water, then leave to cool slightly.
Beat the butter or margarine until soft. Gradually beat in the icing
sugar, milk and chocolate until well blended.