Food - Drink
Is It Safe To Use Old Wine For Cooking?
According to Bon Appétit, not only is it safe to use old wine for cooking, you can do so for quite a long period of time. In fact, assuming you continue to store the wine properly, red or white wines should remain safe to cook with for up to two months or more.
After three to five days you can begin to consider using your old wine for cooking purposes, from braising meats to flavoring stews. Proper storage is essential to extend the wine's life and that includes keeping it away from heat and storing it in a cool refrigerated environment.
With older, properly preserved wines, the gradual diminishment of nuance in the bottle isn't an issue, since as Fine Cooking observes, the flavors that are important to wine-drinking "won't survive cooking." Rather, the issue becomes one of maximizing flavor by using the wine properly.