Store vinegar in a cool, dark place.
Use walnut champagne vinegar in any recipe calling for champagne vinegar to impart an extra nutty flavor. It’s well suited to use as a finishing ingredient and in salad dressings.
Try adding it to vinaigrettes for salads, especially ones with toasted or candied walnuts (maple candied walnuts recipe), roasted beets, endive, blue cheese, or fruit (apples, pears, figs, berries, citrus, etc) tossed in them.
How to Make a Vinaigrette
Walnut vinegar makes excellent mignonette sauce for use with fresh oysters.
Basic Mignonette Sauce Recipe
Simmering this vinegar to reduce it is not recommended, as doing so can damage its flavor.