Variations of the bismark donut

Whether you refer to it as a Bismarck or a Berliner, the dough used to create this donut is fundamentally the same across the globe. While the size and shape may differ slightly—jelly-filled or Bismarck donuts in America are generally comparable in size to other donuts—Berliners in Europe are often more oblong, typically larger and longer than the average donut.
The most significant variation between regions lies in the filling. In the United States, the jelly used in donuts is usually raspberry or strawberry flavored and has a thinner consistency than jam. Some donut chains, such as Dunkin', opt for a blend of corn syrup and fruit concentrates instead of authentic jam or jelly. In Germany, however, there is a wide array of jams used for this type of donut, with unique flavors like rose hip, apricot, and plum being particularly popular.
Italy's Bomboloni donut shares a similar structure with the Bismarck but is filled with pastry cream and rolled in granulated sugar instead of powdered sugar. Technically, a Boston cream donut also falls under the Bismarck classification, featuring a pastry cream filling and topped with a chocolate glaze instead of powdered sugar. A Paczki, a Polish donut traditionally enjoyed on Fat Tuesday before the Lenten fast, differs in its dough, which is typically richer and denser due to the addition of butter.
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