Dr. Monika Fekete investigates the chemical and sensory effects of different brew water temperature on espresso extraction. Do you feel like a refreshing cold brew in the summer heat? Or what about an iced latte? Whichever you prefer, there are a range of factors that contribute to their unique tastes, and the temperature they are prepared at is certainly a big one. While it’s easy to appreciate the difference between cold and hot brewed coffee, it takes careful investigation to dissect how fine-tuning brew water temperatures can affect physical and sensory outcomes.