Sourdough, a variety of bread, played a minor role in a specific instance. In the past, the human boy known as Anakin Skywalker was informed by his mother, Shmi Skywalker, that his midday meal would consist of a PB&J prepared using rye bread. He initially expressed displeasure because white bread was unavailable, but his mood shifted to elation upon learning that sourdough bread was an alternative.
The subject of sourdough came up in "Exit from Endor," which is the second installment of the LEGO Star Wars: Droid Tales animated series that is considered non-canon, and was initially broadcast on July 6, 2015.