Sorrel soup or green borscht is a hearty, sour-flavored Ukrainian soup made with sorrel leaves, stock, butter, onions, sugar, lemon juice, sour cream, and beaten egg yolks. The soup is also popular in Russia and Belarus, and it can be served warm or chilled.

Today, there are numerous versions of the soup throughout Eastern Europe, so cooks add different ingredients into it, such as spinach, carrots, potatoes, or beetroot. Serve green borscht with a dollop of sour cream and a slice of rye bread.