Double Rich Chocolate Brownies
["12 oz. semi-sweet chocolate chips", "1/3 c. butter", "1/2 c. sugar", "2 eggs", "1 tsp. vanilla", "1/2 c. flour", "1/2 c. chopped nuts (optional)"]
["Add 1 cup chocolate chips in butter in saucepan. Stir until melted. Remove from heat. Add sugar.", "Add eggs (one at a time). Mix well.", "Stir in vanilla.", "Pour dry ingredients into chocolate mixture. Stir until smooth. Add remaining chocolate chips.", "Pour into a greased 8-inch square pan. Bake at 375\u00b0 for 25 to 30 minutes."]
["semi-sweet chocolate chips", "butter", "sugar", "eggs", "vanilla", "flour", "nuts"]