1cup(2 sticks) unsalted butter, melted with half the chocolate
6oz.semi-sweet bakers chocolate, chopped, or 1 cup semi-sweet chocolate chips, divided
1cupbrown sugar, packed
Preheat your oven to 350° and line a 9 x 13" cake pan with aluminum foil. Leave a little extra foil hanging over the sides to make removing the brownies from the pan easier.
In a medium bowl, whisk the flour, cocoa powder, and salt and set aside.
In a large, microwave safe bowl, add the unsalted butter and half of the chocolate. Microwave in 15-second intervals, stirring in between, until melted and smooth. Add both sugars and whisk vigorously to combine, then add the eggs, egg yolks, and vanilla extract and whisk until smooth.
Add the dry ingredients and whisk until combined and smooth. Fold the remaining chopped chocolate or chocolate chips into the batter, then pour the batter into the foil-lined pan. Use a spatula to spread it out evenly and bake in the preheated oven for 25 minutes.
Let the brownies cool slightly in the pan before removing and slicing.
*If you're using salted butter then reduce the added salt to ¼ teaspoon.