It’s obvious that we human beings are all pretty different from one another—in appearance, experience, attitude, gender, and countless other attributes. Each of us has things that come effortlessly and others at which we struggle. It goes without saying that these differences affect our abilities as tasters. But how, exactly?
Nearly all malt flavor derives from a few chemical reaction systems: Maillard browning (aka non-enzymatic browning), and a similar, but distinct process known simply as “caramelization.” Maillard involves many forms of carbohydrates plus nitrogen-containing amino acids found in malt. Caramelization mainly involves sugar, typically in a dense and liquid state, like when you put sugar in a pan and heat it until it browns and changes flavor. At the highest temperatures a process called “pyrolysis” takes over, which is just a fancy technical way of saying “burning,” specifically of sugar molecules.