[unreal808]

The Oxford Companion to Food comments that, strictly speaking, "spotted dick" is made by taking a flat sheet, spreading sugar and raisins on it, then rolling it up. A similar dessert is "spotted dog," a plain cylinder of suet paste with the raisins and currants and sugar stuck into it, so that the spots are visible on the outside. Both spotted dick and spotted dog were traditionally boiled (or even steamed) in a cloth, but nowadays they are usually baked.

The dessert is slightly different in Ireland. In Ireland in the late 1800s, the tradition of yeast-bread manufacture was not strong, so most breads were raised with bicarbonate of soda and an acid, rather than with yeast, and thus called soda breads. Thus, the spotted dick in Ireland is sweet soda bread, with sugar, currants, and raisins, and it's also called the spotted dog or railway cake.