The Kaiser Roll
, also called a Vienna roll
or a hard roll
, is a kind of bread roll, popular in the United States
. It is typically a crusty round roll, often sprinkled on top with poppy or sesame seeds, made by folding corners of a square inward so that their points meet. It is often used as a bun
for sandwiches, including hamburgers
It was supposedly invented in Vienna, and is thought to have been named to honor Emperor Franz Josef. In New England the Kaiser roll is called a bulkie roll. Sandwiches made with bulkie rolls are very common in area delicatessens, restaurants.