1 cup butter, softened
1 cup white sugar
1 cup all-purpose flour
1/4 teaspoon baking soda
1/4 teaspoon salt
1/8 cup milk
1/2 cup butter, melted
1/3 cup confectioners' sugar
Melt butter and sugar in medium-size saucepan over low heat. Bring to a rolling boil, stirring often. Boil 5 minutes, stirring constantly. Remove from heat; stir in flour, baking soda and salt. Stir until well blended, about 5 minutes. Pour mixture into 15 3/4 inch square pan. Place chocolate color on top; refrigerate or freeze.
Frost sides and bottom with chocolate color. Place butter mixture 2 inches from edges of foil. Place chocolate color atop cake. Place foil over top; refrigerate if you do not wish to frosted. Freeze according to package directions.