Julius Brantner - Bio Brothandwerk 25

To quote Tina Turner: simply the best. Seriously -- if you're in München it's worth a stop. They often sell out by around 2 pm, and if it's before a holiday be prepared for a line around the block. Possible to order online for pick up.

Their other breads are also good, but the 25. Really stands out. From their website:

The master baker's personal favorite... Due to the natural organic sourdough he makes from wholegrain rye, and a 48-hour maturing time, this bread is rich in aromatic flavor and stays fresh for an extra long time.