Leftover Flat Champagne? Make Vinegar!
Finally, the holidays are over, resolutions have been made, and life has returned to being more or less quiet...oh yeah, you've still got that half a bottle of champagne in the fridge you forgot about after the ball dropped on New Year's Eve. It's flat, but you don't want to waste it...what to do? Make champagne vinegar, of course!
Making vinegar from leftover wine, Champagne, or sparkling wine is unbelievably easy. Simply pour the liquid into a well-washed mason jar (or other wide-mouthed vessel like a crock) and cover with a couple of layers of cheesecloth (to prevent dust or bugs from getting into it. Then, just store it in a cool, dark place for a month to six months.