Preheat oven to 180 degrees C (350 degrees F) and place the rack in the center of the oven.
Butter (or spray with a nonstick cooking spray) an 8 inch (20 cm) square pan, and line the bottom of the pan with parchment paper.
Melt the chocolate and butter in a large stainless steel bowl placed over a saucepan of simmering water.
Remove from heat and stir in the cocoa powder and sugar.
Next, whisk in the vanilla extract and eggs, one at a time, beating well after each addition.
Finally, stir in the flour, salt and chocolate chips (if using).
Pour the batter into the prepared pan and bake for about 25-30 minutes, or until a toothpick inserted in the center comes out with a little batter and a few moist clumps clinging to it. Do not over bake.
Remove from oven and let cool on a wire rack.
Serve the fudgy chocolate brownie at room temperature or chilled. Add a scoop of Vanilla ice cream and enjoy your yummy fudgy chocolate brownie. Enjoy!
Recipe by Flavor Quotient at http://www.flavorquotient.com/2014/08/fudgy-chocolate-brownie/