1, the method is different: bagels are made by adding proper amount of sugar to flour and then standing for fermentation. After fermentation, knead them into small dough, knead the small dough into strips, then glue the two ends together and bake them in the oven. Doughnuts are made by adding eggs and sugar to flour and stirring evenly, then adding yeast to ferment into dough, dividing the big dough into small dough, slightly flattening the dough, poking a small hole in the middle, and frying in an oil pan until golden brown.
2. Preservation time: Bagels last longer than doughnuts.
It is said that in ancient Christian society, round bread (round pasta often found in ancient bishop's sarcophagus paintings) was the earliest predecessor of bagel. Later in 1683. A baker in Vienna, Austria, made the earliest bagels with yeast-fermented dough in order to pay tribute to the Polish emperor for saving Austria from the Turkish invasion.
Donuts, also known as Donalds, are a kind of sweet food, which is made of flour, sugar, cream and eggs mixed and fried. The two most common shapes are hollow rings, or closed doughnuts, with sweet fillings in the middle of the dough, such as cream and custard (usually called custard).