An article by Mary Taylor Simeti, talks about the earliest written mention of using the endothermic effect to create a frozen confection: http://www.ft.com/cms/s/2/e3220668-7d60-11de-b8ee-00144feabdc0.html Apparently she picked it up from Elizabeth David's "Harvest of the Cold Months." Has anyone here read that book? YIS, Adelisa di Salerno