In the Netherlands, they've even perfected an unexpected peanut butter-based sauce that turns humdrum ... accompaniment for fries, which is malt vinegar. Malt vinegar is fermented from barley ...

In the United Kingdom, it’s most commonly used as a condiment for fish and chips, but I think malt vinegar really shines when it’s part of a sauce or salad dressing. My favorite way to use it is in a ...