Stir the hot butter mixture into the egg mixture until smooth.
05Mix in the flour and chocolate chunks (or chips) until just combined. (Note: If you want the chips to remain intact in the baked brownies, rather than melting in, let the batter cool in the bowl for about 20 minutes before stirring in the chips.)
06Pour batter into the lightly greased 8″ x 8″ pan and bake at 350°F for 20-25 minutes, or until a toothpick comes out mostly clean, with some moist crumbs but no loose batter. Cool completely in the pan on a rack before serving.