There is no ingredient called a “nesselrode.” This frozen confection is named after Count Nesselrode, a 19th century Russian diplomat whose cook is credited with its creation. During the century, frozen iced cream desserts were wildly popular, both in Europe and America. The basic custard mixture, traditionally containing chestnuts in some form, was frozen in fancifully shaped metal molds. These wonderful molds can occasionally be found in antique shops, but are regarded as collectibles and command high prices.