Preheat oven to 350 degrees F. Combine flour, baking soda, salt, sugar and cocoa powder in ungreased 9x13 baking pan.
In a medium bowl combine the water, eggs. oil and vanilla. Beat with a fork to blend.
Pour liquid mixture into cocoa mixture in the pan and stir until smooth. Sprinkle chocolate chip and nuts evenly over top of batter. Bake for 40 minutes. Let cool, slice and enjoy!!