Zingerman's Magic Brownies Recipe - Food.com

Ingredients

• 13 tablespoons butter
• 6 1/2 ounces unsweetened chocolate
• 1 1/2 cups cake flour or 1 1/2 cups all purpose flour
• 3/4 teaspoon baking powder
• 1/2 teaspoon salt
• 4 eggs
• 2 cups sugar
• 1 1/4 teaspoons vanilla
• 1 cup coarse chopped walnuts, toasted