Butterscotch Frosting
["1/2 cup brown sugar", "6 Tbsp butter", "1/3 cup milk", "2 cups powdered sugar", "1/2 tsp vanilla", "1/4 tsp salt"]
["Melt butter and brown sugar slowly, add milk and boil for two minutes. Chill. Add powdered sugar, vanilla and salt. Beat with mixer until thick enough to spread."]
["brown sugar", "butter", "milk", "powdered sugar", "vanilla", "salt"]