blackcap -
An appleroasted until black, to be served in a dish of boiled custard.
Wikipedia
The Blackcap (Sylvia atricapilla) is a common and widespread sylviid warbler which breeds throughout northern and temperate Europe. Its color pattern is unique in the genus Sylvia; the Blackcap's closest living relative is the Garden Warbler which looks different but has very similar vocalizations. These two, whose ranges extend farther northeastwards than other Sylvia, seem to form sister species well distinct from the other typical warblers (The Sylvia Monograph, A & C Black, London; Jønsson & Fjeldså 2006).