Prehaet oven to 350. Grease a 9 x 13 pan.
Beat eggs in a large bowl until thick about 3 mins. Beat in sugar gradually about 1 minute more. Mix in soft butter, vanilla nd dry ingredients.at low speed on mixer.
Scrape sides of bowl often. Stir in 1 cup of chopped walnuts if desired.
Bake at 30 - 35 mins...although I have found my oven does it in 25. Check it so not to overcook...you want the brownies to be nice and fudgey.Cool in pan and Glaze.