1 cup all-purpose flour 1/2 teaspoon baking powder 1/2 teaspoon baking soda 1/4 teaspoon salt 6 tablespoons (3/4 stick) unsalted butter, softened 1 cup granulated sugar 2 eggs 2 (1 ounce) squares unsweetened chocolate, melted and cooled 1 teaspoon vanilla Read More …