There is no better frosting (or is this spreadable fudge? ) than that made by my mother-in-law, Gwyn.
Melt in a microwave and stir until blended:
In a seperate bowl stir together and beat with an electric mixer until smooth.
Combine the butter-chocolate mixutre and milk-sugar mixute, then stir in:
Beat until smooth and thickened: about 5 minutes. Use as frosting before it gets cool and too solid.
This makes enough to cover two 9×9 cakes. (It works great within one 9×9 cake to frost two horizontal layers.)