Chocolate Chip Brownies
["1 large pkg. real chocolate chips", "1/4 lb. butter", "1/8 lb. margarine", "4 eggs", "1 c. sugar", "1 c. flour", "1 tsp. baking powder", "1/2 tsp. salt", "1 tsp. vanilla", "1 c. chopped nuts (optional)"]
["Melt chocolate and butter together; cool.", "Beat eggs with sugar in a large bowl; set aside.", "Mix flour with baking powder and salt.", "Add to egg mixture.", "Add cooled chocolate to this, also 1 cup chopped nuts (optional) and vanilla.", "Bake at 350\u00b0 for 20 to 30 minutes in two 8 x 8-inch pans."]
["chocolate chips", "butter", "margarine", "eggs", "sugar", "flour", "baking powder", "salt", "vanilla", "nuts"]