There are many variations on this idea. Some are rich confections, often using chocolate-flavoured sponge rolled up with whipped cream. A special variety is the French bûche de Noël. (See christmas foods.)
In the USA they are called jelly roll. See also roulade.
© the Estate of Alan Davidson 1999, 2006, 2014 © in the Editor’s contribution to the second and third editions, Oxford University Press 2006, 2014.