Grandma Leones' Caramel Frosting
["1 c. brown sugar, firmly packed", "1 1/2 c. sifted powdered sugar", "5 Tbsp. butter", "1/4 c. milk"]
["Put brown sugar, milk and butter in saucepan and simmer slowly for about 3 minutes and cool.", "Add powdered sugar and stir until creamy."]
["brown sugar", "powdered sugar", "butter", "milk"]