Czernina (Polish pronunciation: [t͡ʂɛrˈɲina] ⓘ, from czarny – "black"; also spelled czarnina or czarna polewka – "black soup") is a Polish soup traditionally made of duck blood and clear poultry broth.

Generally the sweet and sour taste of the soup comes from the balance of sugar and vinegar.

However, there are hundreds of recipes popular in different parts of Poland, Belarus and Lithuania.

Like most Polish soups, czernina is usually served with kluski, fine noodles, macaroni, boiled potatoes, or dumplings.

It is a plot element in Pan Tadeusz, a famous Polish epic poem by Adam Mickiewicz.