
Handkäse (literally: hand cheese) is a German regional sour milk cheese (often Harzer) and is a culinary speciality of Frankfurt. It gets its name from the former way of producing it: forming it with your own hands.
It is a small, translucent, yellow cheese with a pungent aroma that many people find unpleasant. It is sometimes square, but more often round in shape.
I've never tried this cheese, but it looks tasty!