Preheat oven to 350°F. Line the bottom and sides of an 8x8 inch baking pan with parchment paper leaving some overhanging parchment paper to make it easier to pull brownies out of the pan.

• Place butter in a large bowl and heat in your microwave or on a double broiler until melted. You can also melt the butter in a pot on your stove top. Add your brown sugar and granulated sugar to the butter while it's still hot. Whisk to incorporate.
• Add your room temperature eggs and vanilla extract to the butter / sugar mix. Whisk until everything is incorporated.
• Add flour, cocoa powder, salt, and baking soda to the wet ingredients along with any add-ins you'd like (I added chocolate chunks). Fold the ingredients together until everything is fully incorporated and you no longer see any dry ingredients.
• Pour your batter into your prepared baking dish. Place your baking dish into the center of a preheated 350°F oven. Bake for 25 to 30 minutes, or until a skewer inserted into the center comes out clean of batter, but with a few wet crumbs.
• Allow the brownie to cool in the baking dish for 10 to 15 minutes. Transfer to a wire rack to finish cooling. Slice your brownies. Serve plain or top with some ice cream, melted chocolate, chopped nuts, or whatever else you like!