Peanut Butter Fudge
["1 lb. confectioners sugar", "4 Tbsp. cocoa", "4 Tbsp. peanut butter", "1 tsp. vanilla", "1/2 lb. margarine, melted"]
["Sift together confectioners sugar and cocoa, then add peanut butter and vanilla.", "Melt margarine and mix together.", "Place in a 9 x 12-inch pan and refrigerate for 1 hour until set.", "Remove from refrigerator and cut into squares."]
["confectioners sugar", "cocoa", "peanut butter", "vanilla", "margarine"]