A Stulle is a (open) sandwich, though, not a roll. There's also Bemme in Saxony, which means the same.
The Pfannkuchen thing is rather easily explained. It was a Berlin invention and made in a pan so it's actually a Berliner Pfannkuchen. In Berlin and the surrounding region people left out the first part, naturally, while elsewhere they only kept the first part.
In the south it was equated with "Krapfen" (which is actually something slightly different.
And it's not a donut at all.
The Pfannkuchen thing is rather easily explained. It was a Berlin invention and made in a pan so it's actually a Berliner Pfannkuchen. In Berlin and the surrounding region people left out the first part, naturally, while elsewhere they only kept the first part.
In the south it was equated with "Krapfen" (which is actually something slightly different.
And it's not a donut at all.
