Ingredients

Instructions

  1. Preheat oven to 350°. Grease and flour a 13x9-inch pan.
  2. In metal bowl set over pan of barely simmering water, melt bittersweet chocolate, unsweetened chocolate and butter.
  3. Stir until smooth. Remove bowl from heat; let mixture cool until it is lukewarm.
  4. Stir in the sugar and vanilla extract. Add eggs, one at a time, stirring well after each.
  5. Stir in salt and flour, stirring until mixture is just combined; stir in chocolate chips.
  6. Pour batter into pan, smooth top and bake in middle of oven 25-30 minutes, or until a tester comes out with crumbs.
  7. Let cool completely in pan on a rack, then cut it into bars.