A Dorset knob is a hard dry savoury biscuit which is now produced by only a single producer, for a limited time of the year. Dorset knobs are made from bread dough which contains extra sugar and butter. They are rolled and shaped by hand, and baked three times. Once cooked, they are very crumbly and rather like very dry stale bread or rusks in consistency. They are named after their shape's resemblance to Dorset knob buttons, but have also been compared, in size, to door knobs.