Tiste predates the Spanish conquest — it descends directly from a cacao-and-toasted-corn drink brewed by the Chorotega people who settled the shores of Lake Nicaragua.
Toasted corn and cacao are ground together into a dry mix, then whisked with water and sugar over ice into a gritty, chocolatey cooler. It is ladled from big glass jars by market vendors in Granada's Mercado Municipal.