Penuche Icing

1 1/2 cups packed brown sugar
6 Tbsp. milk
6 Tbsp. shortening
1/4 tsp. salt
3/4 tsp. vanilla

Mix all ingredients except vanilla and bring to a boil, stirring constantly, and boil for one minute. Remove from heat and beat until lukewarm. Add vanilla and continue beating until thick enough to spread. If icing becomes too thick to spread, add about 1 Tbsp. or more of cream.