Divinity Fudge
["2 1/2 c. granulated sugar", "1/2 c. light corn syrup", "1/2 c. water", "1/8 tsp. salt", "2 egg whites", "1 tsp. vanilla", "1/2 c. chopped walnuts"]
["Combine first five ingredients in a 3-quart glass bowl or casserole.", "Microwave (High setting) 5 minutes.", "Stir well. Microwave 9 minutes more, or until mixture reaches 260\u00b0 (hard ball stage) on a candy thermometer.", "Do not stir corn mixture."]
["sugar", "light corn syrup", "water", "salt", "egg whites", "vanilla", "walnuts"]