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