Martha Stewart provides a recipe for chocolate chip brownies on her website that calls for both semisweet and bittersweet chocolate as well as cocoa powder, sugar, flour, eggs and butter. Another recipe uses vanilla or white chocolate chips in conjunction with semisweet chocolate chips and nuts.
To make chocolate chip brownies, beat 1 cup of softened butter and 3 cups of sugar together, then mix in 1 tablespoon of vanilla extract and 6 eggs. In another bowl, mix together 1/2 cup of baking cocoa, 1 teaspoon of baking powder, 1/2 teaspoon of salt and 2 1/4 cups of all-purpose flour. Combine the butter and flour mixture until just mixed, then pour into a baking pan. Top with 1 cup of semisweet chocolate chips, 1 cup of vanilla or white chocolate chips and 1 cup of chopped walnuts. Bake for 30 to 35 minutes at 350 degrees Fahrenheit.
Martha Stewart's chocolate chip brownies require that you melt 8 ounces of semisweet or bittersweet chocolate in 8 tablespoons of unsalted butter in a bowl placed over a larger pot filled with simmering water. Combine 1 cup of all-purpose flour, 1/4 cup of unsweetened cocoa powder, 1/2 teaspoon of baking powder and 1/2 teaspoon of salt in a separate bowl. Mix 1 1/4 cups of sugar and 3 eggs into the chocolate and butter mixture, then stir in the flour mixture. Fold in 1 cup of semisweet chocolate chips, and pour the batter into a pan. Bake at 350 degrees Fahrenheit for 50 to 60 minutes.