Oil acts as a solvent and carrier for flavor compounds, allowing them to be perceived separately and sequentially on the palate. It also coats the mouth, prolonging the flavor experience.
Oil plays a crucial role in how we perceive flavor. Many flavor compounds are fat-soluble, meaning they dissolve readily in oil. When you eat something containing oil, these flavor compounds are released and carried by the oil. Because oil doesn't mix well with saliva (which is water-based), the flavor compounds are delivered to your taste receptors in a more concentrated and distinct manner. This allows you to experience different flavor notes sequentially, rather than all at once. The oil also coats the tongue and palate, extending the duration of the flavor experience. Think of it like this: water washes away flavors quickly, while oil clings to them, allowing for a more nuanced and prolonged tasting experience. The presence of oil can also affect the texture of food, which in turn influences how we perceive flavor. A smoother texture, often imparted by oil, can enhance the perception of certain flavors.
When tasting olive oil, swirl it in your mouth to fully coat your palate. This allows you to better detect the subtle nuances and flavor layers present in the oil.