1 1/2 c. brown sugar
1/4 c. milk
2 tbsp. butter
1 tsp. vanilla

Mix together in saucepan brown sugar, milk and butter. Bring to boil and boil three minutes, stirring constantly. Remove from heat. Add vanilla. Cool to lukewarm. Beat until creamy and thick enough to spread. Add powdered sugar if not thick enough or a little milk if too thick.