Coffee Frosting

 1 cup butter

2 cups sugar

1/2 cup strong coffee

1/2 cup milk

 4 1/2 cups powdered sugar

Melt the butter in a large saucepan. Add the sugar; bring to a boil over low heat, stirring constantly. Boil for 4 minute. Combine the coffee and milk; add to the sugar mixture, stirring until the mixture boils. Remove from the heat and cool. Slowly add the powdered sugar, beating with a spoon until the mixture is thick enough to spread.