Preheat oven to 350ºF. Line a 13x9x2 inch baking pan with aluminum foil, letting foil extend 2 inches beyond each short side of pan.

In large bowl, whisk together Stout Beer and cocoa powder until blended and smooth.  Whisk in sugar, butter, vanilla extract and eggs, one at a time. Blend well.

Add flour and salt; whisk until batter is smooth. Stir in chocolate chips. Spread mixture in prepared pan, leveling surface with a spatula. Bake 42-45 minutes in preheated oven, until top is shiny and dry, and a wooden pick inserted in the center comes out with a few moist crumbs attached. Remove from oven and let cool completely in pan on rack.

Lift out brownie from pan by foil ends; transfer to cutting board. Cut lengthwise into four strips and crosswise into 8 pieces, making 32 brownies.