These brownies are Amazing. Easy to make, delicious, and easy to eat! They are better on the second day...that's why I call them the morning after brownie.
Butter a 13-by-9-inch baking pan and line with buttered parchment paper. Preheat oven to 350 degrees.
Melt the butter and chocolate together and stir smooth;
stir in the dark brown sugar.
In a large bowl, whisk the white sugar and flour together; a little at a time, whisk in the eggs, vanilla, and salt.