in ontario and the prairie western provinces of canada, as well as parts of the midwest in the u.s., such a round jelly- or custard-filled doughnut is commonly called a "bismarck," while a filled bar doughnut is called a "long john", and usually contains pastry creme, custard or whipped cream but can contain a jelly filling. other canadian terms include "jambuster" in manitoba, and "burlington bun" in nova scotia.