The Ultimate Chocolate Bar

Ingredients : ½ cup butter 1 (1 ounce) square unsweetened chocolate 1 cup white sugar 1 cup all-purpose flour ½ cup chopped walnuts 1 teaspoon baking powder 1 teaspoon vanilla extract 2 eggs 6 ounces cream cheese softened ½ cup white sugar 2 tablespoons all-purpose flour 1 egg ½ teaspoon...