Wine concentration curve is a descriptive kitchen concept used to explain how a wine’s flavour changes as it is reduced during sauce preparation. The change is not perfectly linear: as water evaporates, non-volatile components become more concentrated, and small additional reductions near the end can create a significant change in acidity, sweetness, tannin and bitterness. It is not a formal scientific measurement or a standardised culinary term.
Water evaporates from the pan, concentrating dissolved acids, sugars, tannins and other non-volatile compounds. Alcohol and volatile aroma compounds also evaporate to varying degrees. The final flavour depends on the wine, heat, pan surface area, reduction time and ingredients added.
As the volume becomes smaller, each additional minute of reduction can have a larger sensory impact. A wine that tastes balanced at one volume may become too acidic, bitter, sweet or intense if reduced further. The pan may also scorch if the liquid becomes too concentrated or the heat is too high.
Example: a red wine reduction may taste balanced after a moderate reduction, but if reduced to a syrup it can become excessively concentrated and bitter.
Use a consistent pan and heat source, monitor volume and viscosity, and taste during the final stage. Add stock or another liquid if the reduction becomes too intense, then rebalance the sauce.
Chef’s tip: reduce to the flavour and consistency required by the recipe, not to an arbitrary percentage. The “concentration curve” is a useful teaching idea for explaining why the last stage of reduction requires close attention.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
