Instant coffee production strips away volatile aromatics

Tom Hunt evaluated several supermarket instant coffees, finding that the industrial manufacturing process consistently produces a one-dimensional flavour profile (The Guardian). Manufacturers brew coffee at scorching temperatures before either freeze-drying the liquid in a vacuum or spray-drying it with hot air. This method removes the volatile flavour compounds and bright aromas that define high-quality fresh coffee, leaving behind an earthy, musky, and bitter character.

The resulting granules often exhibit notes of chicory, bitter chocolate, and burnt sugar, which Hunt describes as a simulation rather than a true representation of the bean. While the addition of milk can mask these defects by introducing notes of nuts and caramel, the base product remains structurally limited. Hunt notes, "Almost all of these products have a similar industrial imprint, uniform granules and a one-dimensional flavour profile, so they’re ultimately more a simulation of the real thing."

This process contrasts sharply with the precise aromatic control sought in specialty brewing, where temperature and extraction are managed to preserve delicate compounds. For those seeking exceptional quality, the industrial imprint of instant coffee remains a barrier to replicating the complexity found in fresh, ground coffee.