Danish Fudge
["3/4 c. butter (1 1/2 sticks)", "1 lb. brown sugar", "1 (6 oz.) can Pet milk (2/3 c.)", "1 tsp. vanilla", "1 lb. less 1/2 c. powdered sugar", "1 c. nuts (optional)"]
["Melt butter in a 3-quart saucepan. Add brown sugar and Pet milk. Stir to blend.", "Bring to a boil.", "Boil exactly 3 minutes. Remove from heat and let cool 2 minutes."]
["butter", "brown sugar", "Pet milk", "vanilla", "powdered sugar", "nuts"]