In top of double boiler or microwave-safe bowl, melt chocolate and butter.
In medium bowl, mix sugar, vanilla, and salt; add to melted chocolate mixture and blend well. Add eggs, one at a time, beating well after each addition. Add flour and mix well.
Divide batter equally into prepared pans. Spread evenly and sprinkle top of each with chopped nuts and chocolate chips.
Bake for 25 minutes (do not overbake). Allow to cool completely before cutting. Run a thin knife between pan and brownies and turn upside down. You may need to shake hard to release brownies from pan. Cut brownies into 8 pie-shaped pieces. Makes 16 brownies.