白菜汤（俄语：щи）是俄罗斯一种以圆白菜为原料的汤。用酸白菜制作的汤称为酸白菜汤。也有用菠菜、酸模、荨麻制作的汤，称为青菜汤（зелёные щи）。

菜汤的材料有白菜、肉类、蘑菇、面粉、香料（洋葱和大蒜）等。肉和菜分开烹煮，上菜前再加上斯美塔那酸奶油。传统上配合黑麦面包食用。

白菜汤在俄国在悠久的历史，早在9世纪白菜从拜占庭传入就已经出现了。因为此汤制作简易、可单独食用或配搭肉类，而且可以冷冻携带，在10世纪就成为俄国人的家常菜了。俄有谚云：白菜汤和荞麦粥是我们的食物（Щи да каша — пища наша）。

Shchi (Russian:щи;IPA: [ɕːi]) is a Russian style of cabbage soup. When sauerkraut is used instead, the soup is called sour shchi, while soups based on sorrel, spinach, nettle, and similar plants are called green shchi (Russian:зелёные щи, zelyoniye shchi). In the past, the term sour shchi was also used to refer to a drink, a variation of kvass, which was unrelated to the soup.