Juoda duona is a traditional bread consisting of ground rye flour, starter, and water. The dough must be kneaded for a long time before baking, and it is always left to ferment overnight. Once it is baked, juoda duona is consumed for breakfast, lunch, and dinner.

Traditionally, bread baking in Lithuania is always done by the eldest woman in the house, and if visitors come over, it is a custom that they stay until the baking process is done.