Beacon Hill Cookies
["2 egg whites (at room temperature)", "1 dash of salt", "1/2 c. sugar", "1/2 tsp. vanilla", "1/2 tsp. vinegar", "1 c. chocolate chips", "1 c. walnuts, coarsely chopped or whole"]
["Beat egg whites and salt until foams.", "Add sugar, then beat until peaks foam.", "Add vanilla and vinegar.", "Melt chocolate chips and add walnuts.", "Fold into the above mixture."]
["egg whites", "salt", "sugar", "vanilla", "vinegar", "chocolate chips", "walnuts"]