1 cup unsalted butter
3 1/2 cups semisweet chocolate chips
3 large eggs
1 tablespoon pure vanilla extract
1 cup plus 2 tablespoons granulated sugar
1/2 cup plus 2 tablespoons all-purpose flour
1 1/2 teaspoons baking powder
1/2 teaspoon salt
Preheat the oven to 350˚F. Grease a 9x13 metal pan.
Melt the butter and 2 cups of the chocolate chips in a double broiler.
Whisk together the eggs, vanilla, and sugar in a medium sized bowl until just combined and add in the melted chocolate and butter mixture. Let cool.
Sift together 1/2 cup of the flour, baking powder, and salt. Add this to the chocolate mixture. Combine the remaining 1 1/2 cups chocolate chips and 2 tablespoons of the flour and add to the mixture. Pour evenly in prepared pan.
Bake for 30 minutes. Once the brownies have been in the oven for 15 minutes, tap the sides of the pan to allow any air between the pan and the batter to escape.
Let cool before cutting into bars.
Source: Annie's Eats