One Bowl Brownies
["4 sq. unsweetened chocolate", "3/4 c. (1 1/2 sticks) butter", "2 c. sugar", "3 eggs", "1 tsp. vanilla", "1 c. all-purpose flour", "1 c. walnuts, chopped (optional)"]
["Microwave chocolate and butter in a large bowl on High 2 minutes or until melted. Stir until chocolate is completely melted. Stir sugar into chocolate. Mix in eggs and vanilla. Stir in flour and nuts. Spread into a greased 9 x 13-inch pan and bake at 350\u00b0 for 30 to 35 minutes."]
["unsweetened chocolate", "butter", "sugar", "eggs", "vanilla", "flour", "walnuts"]