Vinegar made from Champagne. It has a pale color and a delicate flavor.
Substitute white wine vinegar.
Champagne vinegars made in France tend to have a more full-bodies, interesting, and authentic Champagne flavor than those made elsewhere. They’re not as easy to find, however.
Keep away from heat and light. Unopened, it will keep indefinitely. Once opened, it should last about 6 months.