Never Fail Cold Fudge
["1 box 10xx sugar", "1/2 c. cocoa", "pinch of salt", "1/2 lb. margarine, melted", "1/2 c. peanut butter", "1 tsp. vanilla"]
["Melt margarine; put in all ingredients in a bowl.", "Pour in melted margarine and stir until smooth; put mixture in pan and chill until firm.", "Add nuts (optional).", "Cut in squares."]
["sugar", "cocoa", "salt", "margarine", "peanut butter", "vanilla"]