Kartoffelsuppe is a popular German soup made with potatoes as its key ingredient. The soup is usually cooked with the addition of onions, celery, butter, and milk. It is characterized by a very thick consistency. This soup is a specialty of the Baden region, traditionally served at harvest time, when it is often accompanied by plum cake.

In other German regions, Kartoffelsuppe is often consumed with steamed dumplings. In some varieties of the soup, such as the Berlin Kartoffelsuppe, it is recommended to garnish the dish with croutons and parsley.