Roast Levels

From Green Bean to Cup: How the Maillard Reaction and Caramelization Create Light, Medium, and Dark Roast Flavors

The distinct flavors of light, medium, and dark coffee roasts are created by the Maillard reaction and caramelization, chemical processes that transform green beans through heat. Understanding these reactions helps explain how acidity, sweetness, body, and aroma develop, guiding both roasters and brewers.