pre-heat the oven to 325˚
line an 8x8 inch square pan with foil or parchment paper or butter it well, set aside
heat a pan of water over medium heat, place a heatproof bowl over it, pyrex works well here
make sure the bowl doesn't touch the water
place the butter in the bowl and let it melt
once it melts add the sugar and the cocoa, mix them in well
remove the bowl from the heat, let it cool until it's just warm
then stir the salt and vanilla
add the eggs one at a time and mixing each one in well
when the batter is nice and shiny add the flour and stir until just mixed in
the stir it an additional 40-50 strokes
scrape it into your prepared pan
bake in a 325˚ oven for 20-25 minutes
begin checking for doneness at 20 minutes
use a toothpick but remember you're not looking for a perfectly clean toothpick, fudgy moist brownies will have a fudgy moist toothpick too but it won't be batter covered, it will be moist,
don't over bake them