Sugar And Plumm Triple Chocolate Brownie

Ingredients

• 1 1/2 cup all-purpose flour
• 1 tablespoon baking powder
• 2 1/4 cup unsalted butter
• 19 ounce bittersweet chocolate, roughly chopped
• 8 ounce unsweetened chocolate, roughly chopped
• 2 teaspoon salt
• 7 large eggs, room temperature
• 2 1/4 cup sugar
• 1 tablespoon vanilla extract
• 1 cup semi-sweet chocolate chips