Pre-heat the oven to 350 degrees F. Butter a square baking pan (I used 8x8 but 9x9 works just as well).
In a medium bowl, sift together the flour and salt and then set aside.
In a double boiler (or with whatever method you prefer to melt chocolate) melt together the chocolate and butter until fully melted and combined. Take off of heat.
Pour the chocolate mixture into a large bowl and stir in the sugars, extract, and beer.
One at a time, whisk in the eggs to chocolate and sugar mixture.
Add the dry ingredients to the wet chocolate mixture and stir until well combined.
Pour mixture into prepared pan and bake for 35-40 minutes or until a toothpick comes out clean.