• 1 stick butter, melted
  • 1 cup dark brown sugar
  • 1/4 cup whole milk
  • 3 1/4 cups sifted powdered sugar
 Stir the sugar into the melted butter.  Bring to a boil, stirring, and boil for 1 minutes.Remove from the heat and stir in the milk.  Beat until smooth.Stir in the sugar.Spread on cake while still warm.