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 flavours such as vanilla, chocolate, coffee, mango and strawberry, many Chinese ice-cream manufacturers have also introduced other traditional Chinese flavours such as black sesame and red bean. In 1651, Italian Francesco dei Coltelli opened an ice cream café in Paris, and the product became so popular that during the next 50 years another 250 cafés opened in Paris. In Greece, ice cream in its modern form, or "pagotó" (), was introduced in the beginning of the 20th century. India is one of the largest producers of ice cream in the world, but most of its ice cream is consumed domestically.