Keepsake Brownies
["4 sq. unsweetened chocolate", "1 c. butter", "2 c. sugar", "3 eggs, beaten", "1 tsp. vanilla", "1 c. sifted all-purpose flour", "1/4 tsp. salt", "1 c. broken walnuts"]
["Melt chocolate and butter over hot water. Remove from heat. Add sugar, eggs and vanilla. Mix well. Stir in walnuts. Mix and sift flour and salt; add gradually, mixing well. Pour into greased and floured 9-inch square pan. Bake at 350\u00b0 for 45 to 50 minutes. Cool thoroughly before cutting into squares."]
["unsweetened chocolate", "butter", "sugar", "eggs", "vanilla", "flour", "salt", "walnuts"]