Check the expiration date on the package to ensure that the buttermilk is fresh 检查外包装的截止日期,以保证白脱牛奶是新鲜的。
2.
Fresh milk to which vinegar has been added ( 2 teapoons per cup ) can replace buttermilk ( and sour milk ) in most recipes 处方:新鲜的牛奶加一些醋(两茶壶一杯) ,可以放一些白脱牛奶(和酸牛奶) 。