There is only one variety of Buttercups. This breed is distinguished by its unusual comb in both sexes and parallel rows of black spangles in the feathers of the female. Bantam Standard describes the comb as having: A single leader from base to beak to a cup-shaped comb, well set on the center of the skull, and crowned by a complete circle of medium-sized regular points.
The Buttercup, along with the Penciled Hamburgs, shows extreme differences in color pattern between the sexes. The male has black restricted to flights and tail whereas the female is heavily marked with black except in the hackle. In type, they lean towards the Mediterranean. Buttercup bantams are very rare.