Why does food lose its flavor when you have a stuffy nose? Why do sommeliers smell wine before tasting it? And why do the smells of certain foods and drinks — hot coffee, fresh baked bread, toasted nuts — trigger our cravings? The answer to all of this is found in the relationship between and the science behind smell and taste.
Taste buds on the tongue and roof of the mouth detect five basic categories: sweet, sour, salty, bitter and umami. Each person has between 5,000 and 10,000 taste buds, and each of these taste buds contains dozens of sensory cells.
When these cells are stimulated, they send signals to the brain that help identify taste. Taste, however, isn't the only factor that contributes to flavor.
(At the Institute of Culinary Education, students explore how taste, aroma and texture conspire to shape flavor.)
Why Aroma Plays a Big Role in Flavor
If you pinch your nose and bite into a strawberry, you’ll notice sweetness and acidity — but not the fruit’s full flavor. Release your nose, and the flavor becomes much clearer. That’s because flavor is a combination of taste and smell.
As you chew, aromatic compounds travel through the nasal passages to scent receptors that send signals to the brain. Together with taste, these signals create what we perceive as flavor.
Researchers have found that humans can detect up to one trillion scents through roughly 400 types of receptors — far more than previously believed.
For chefs and food professionals, this connection shapes how guests experience a dish.
Aroma can trigger memories, influence cravings and even affect ordering decisions. The smell of croissants, for example, is often used in bakeries to encourage impulse purchases.
It can also shape perception at the table.
At Dessert Bar in New York City, an olive and eucalyptus gelato was once served as the first course of a tasting menu. The eucalyptus wasn’t in the gelato itself — it was introduced as an aromatic vapor using liquid nitrogen.
Because eucalyptus has a menthol-like scent that clears the sinuses, it heightened guests’ perception of the olive oil flavor.
Even though guests never consumed eucalyptus, many believed they could taste it.
Used thoughtfully, aroma can deepen flavor, create lasting food memories and shape the overall dining experience. For chefs and hospitality professionals, understanding this relationship opens new possibilities for creativity in the kitchen.
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