Ebelskiver Pan

A pan designed for making traditional danish pancakes. Æbleskiver are cooked on the stove top by baking in a special pan with several hemispherical indentations. The pan exists in versions for gas and electrical stoves (the latter with a plain bottom). Pans are usually made of cast iron, allowing good heat retention. Traditional models in hammered copper plate exist but are today used primarily for decoration. (source)