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1. Melt chocolate and butter in the microwave, or in the top of a double boiler. In a large bowl, combine confectioners’ sugar, vanilla and 1/2 cup of the milk. Blend in the melted chocolate mixture. Add remaining milk, a little at a time, until desired consistency is achieved.
2. Let stand until spreadable (frosting will thicken as it cools).

  1/2 cup butter
  3 (1 ounce) squares unsweetened chocolate
  1 pound confectioners’ sugar
  1/2 teaspoon vanilla extract
  3/4 cup milk