(TrendHunter.com) Cafe Rio Mexican Grill is putting its own twist on the classic pumpkin spice latte by serving up a new Pumpkin Spice Horchata. For those unfamiliar, horchata is a traditional Mexican drink made... (TrendHunter.com) Cafe Rio Mexican Grill is putting its own twist on the classic pumpkin spice latte by serving up a new Pumpkin Spice Horchata. For those unfamiliar, horchata is a traditional Mexican drink made...