Does anyone know where Thai Iced Tea originated? It seems like an an Americanized recipe, but all searches for it lead me back to Thailand. According to Wikipedia, it's called Cha-Dam-Yen. When did the use of sweetened condensed milk in Thailand become popular? Was dairy used in authentic Thai Tea? If so, which kind? How long has it been served cold? I have two Thai cookbooks, and only one of them (Keo's Thai Cuisine), has a recipe for it, but no historical info.Any info about Thai Tea, iced or not iced is helpful. Thanks!