Chocolate Chip Walnut Brownies

Ingredients (11)

• 1 cup (2 sticks) unsalted butter
• 8 ounces semi sweet chocolate,
• 3 ounces unsweetened chocolate,
• 1 cup + 2 tablespoons granulated white sugar
• 3 large eggs,
• 1 tablespoon vanilla extract
• 3/4 cup all purpose flour
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon kosher salt
• 1 cup (or more) coarsely chopped walnuts
• 1 cup semi sweet chocolate chips