Ice cream churns the ice cream mixture while cooled inside a household freezer. Some more expensive models have an inbuilt freezing element. A newer method is to add liquid nitrogen to the mixture while stirring it using a spoon or spatula for a few seconds; a similar technique, advocated by Heston Blumenthal as ideal for home cooks, is to add dry ice to the mixture while stirring for a few minutes. Some ice cream recipes call for making a custard, folding in whipped cream, and immediately freezing the mixture. Another method is to use a pre-frozen solution of salt and water, which
Ice cream cake from biscuits and cream. Victorian era desserts called bombes consisted of ice cream and fruit in decorative molds. Sometimes these desserts were lined with cake or biscuits. Ice cream cake recipes dating to the 1870s have also been found. Ice cream cakes are popular in the U.S. Carvel has a history of themed cakes advertised on television including Fudgie the Whale and Cookie Puss. Baskin-Robbins, Dairy Queen, Friendly's, Cold Stone Creamery, and other retailers also sell ice cream cakes. It is common for ice cream cake to be used as a birthday cake during birthday celebrations. At times, when ice