In terms of nice pastries that can survive being stuffed in a handlebar bag for a couple of hours, and you're in Germany, I highly recommend the Rosinenschnecke.
My fave was the Streuselschnecke
@hippy started
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In terms of nice pastries that can survive being stuffed in a handlebar bag for a couple of hours, and you're in Germany, I highly recommend the Rosinenschnecke.