½cupplus 2 tablespoons light brown sugar(125 grams)
4largeeggs, lightly beaten in a separate bowl(210 grams)
2tspvanilla extract
¼ to ½teaspoonsalt (use ½ teaspoon if butter is unsalted)
¾cupplus 1 tablespoon AP flour(115 grams)
¾cupchocolate chunks(around 100 grams)
Instructions
Preheat the oven to 350 degrees F. Grease bottom of a 12x9 inch sheet pan or a 13x9 inch cake pan.
Put the butter and chocolate in the top of a double boiler and heat over simmering water until melted and smooth. Alternatively, you can melt in the microwave.
Remove chocolate from heat and whisk in sugars. Mixture should be just lukewarm at this point. Whisk in eggs one by one. Stir in the vanilla and salt, then add the flour and stir until blended.
Scrape the batter into the pan and run a knife through it to help bring air bubbles to the surface.
Put the pan in the oven (if using a disposable pan, set it on a baking sheet) and set the timer for 35 minutes. About halfway through, open the door and scatter the chocolate chunks onto the brownies so that they break the surface. Total bake time should be around 35 minutes.