What is bismark doughnuts?

Bismark doughnuts are a type of doughnut that originated in Michigan. They are round with a hole in the center and are typically filled with custard or jelly. Bismark doughnuts are often covered in powdered sugar or glaze and are a popular breakfast or dessert treat. They can be found at many doughnut shops and bakeries across the United States. Bismark doughnuts are named after Otto von Bismarck, a German statesman who was the first chancellor of the German Empire. However, it is not clear why the doughnut was named after him.