Post by Dr. Steffen Schwarz

Sugar in coffee: simple habit, sensory scandal - or one of the most underestimated tools in the cup? My new article in the latest double issue of GVMANAGER 6–7/2026 explores a question that is often treated far too morally in the coffee world: what does sugar actually do to coffee? In much of the speciality coffee community, sugar is still seen as a confession. Add it, and one is quickly suspected of hiding defects, missing complexity, or disrespecting the work of producers, roasters and baristas. Yet sensory science tells a more intriguing story. Sucrose is not merely a sweet layer placed on top of coffee. It acts like a small but powerful control on the sensory mixing desk. It can suppress bitterness, alter the perception of acidity, change the apparent body, and even shift aromatic interpretation towards caramel, nutty, fruity or confectionery-like impressions - without necessarily changing the volatile aroma release itself. That is why a tiny amount can make a dark, bitter coffee appear smoother and more balanced. The same amount may make a highly acidic, lightly roasted coffee seem narrower, sharper, or almost candy-like. In a well-balanced cup, sugar may not improve or destroy the coffee at all - it may simply flip the profile into another direction. The real question, therefore, is not: “Is sugar allowed?” The better question is: “What exactly is this dose doing to this coffee?” A full sugar stick is often no longer modulation, but redefinition. A trace amount, however, can work almost like a sensory adjustment - comparable to a small change in grind size, water temperature, roast development or extraction. For gastronomy, vending, office coffee, care catering and speciality coffee alike, this matters. Because guests do not experience chemistry; they experience perception. And perception is where sweetness, bitterness, acidity, aroma, memory and expectation meet. I am curious: how do you see it? Is sugar in coffee a failure of quality, a legitimate guest preference, or a precise sensory tool when used consciously? Thank you to GVMANAGER for including this topic in the new issue. I look forward to the discussion. #Coffee #SpecialityCoffee #GVMANAGER #CoffeeScience #SensoryScience #CoffeeCulture #Gastronomy #CommunityCatering #Foodservice #CoffeeIndustry #Flavour #Sucrose #Hospitality #Barista #Roasting