Butter Rich Brownies
["4 oz. unsweetened chocolate", "2 sticks (1 c.) unsalted butter, softened", "2 c. sugar", "3 large eggs", "1 tsp. vanilla", "1 c. all-purpose flour", "3/4 c. chopped walnuts (optional)", "pinch of salt"]
["Preheat oven to 350\u00b0.", "In a small, heavy saucepan, melt the chocolate and 1 stick of butter over low heat, stirring until mixture is smooth.", "Cool completely.", "In a large bowl with electric mixer, cream together remaining 1 stick of butter and the sugar, beating until mixture is light and fluffy.", "Add eggs, one at a time, beating well after each addition.", "Stir in vanilla and the chocolate mixture.", "Add the flour and a pinch of salt, stirring until mixture is blended well.", "Stir in walnuts.", "Pour into buttered and floured 13 x 9 x 2-inch pan, smoothing top. Bake in preheated oven for 30 to 40 minutes, or until pulls away slightly from sides of pan.", "Serves 12."]
["unsweetened chocolate", "unsalted butter", "sugar", "eggs", "vanilla", "flour", "walnuts", "salt"]