A bagel is a bread dough roll, unusual both in shape and cooking technique. It is formed into a doughnut- or toroidal shape with a hole in the center, boiled, often glazed, and then baked. There are many variants, but it is often considered part of Jewish-American cuisine. It originated in Eastern Europe, but the American bagel industry formally began in New York City, with the formation of Bagel Bakers Local #338 in 1909.
Bagel dough contains little to no fat, so stale bagels become very hard. Well into the 1960s, it was unusual to find other than plain or egg dough, possibly with coverings of poppy seed, onion slivers, or sesame seed. As it has become more a part of mainstream American cuisine, there are many more variations, including sweet doughs, with chocolate, fruits, and nuts.