1/3 c. butter
1/4 c. rich milk
1 c. brown sugar, firmly packed
2 c. powdered sugar
1 1/2 tsp. vanilla
Combine in heavy 2 quart saucepan, butter, milk and brown sugar. Stir constantly over low heat. Bring to a boil and let boil for 2 minutes. Set off heat and let cool until you can hold your hand comfortably on bottom of pan. Then add powdered sugar 1 cup at a time, stirring in each one until smooth. Add vanilla and beat until creamy. IF it is too thick for spreading easily, add about 1/2 tablespoon milk at a time until spreadable. This is enough to frost a 9"x13" loaf cake generously.
Also may use this same recipe and add chopped pecans, put on buttered plate and cut for quick candy. Do not add extra milk for candy, though.