||Preheat oven to 350 degrees.Bring a saucepan of water to a boil. Turn off heat. Set a heatproof bowl over water, and put butter and chocolate in bowl. Melt, stirring occasionally.In a separate bowl, whisk eggs. Add salt, sugars, and vanilla. Stir in chocolate and butter mixture. Fold in flour and nuts.Pour batter into a 9″x13″ pan that has been buttered/sprayed. (The recipe also suggests lining the pan with buttered parchment or foil.) Spread batter evenly in pan.Bake for 40 to 45 minutes. The top will form a shiny crust and the batter will be moderately firm.
Cool on a rack. Cut brownies into squares and enjoy!