Moist Semisweet Chocolate Brownies

Heat oven to 350 F. Grease and flour a 9-inch square baking pan. Melt the 8 ounces of semisweet chocolate with butter in a double boiler or in a stainless steel bowl over simmering water until smooth, stirring frequently. Remove from the heat and let the mixture cool. In a mixing bowl with an electric mixer, beat the sugar with eggs and salt until thick. Stir in vanilla and flour. Stir in the melted chocolate and butter mixture. Stir in chocolate chips. Spread in prepared pan and bake in the preheated oven for 20 to 25 minutes, until a toothpick comes out with just a small amount clinging.