Apple cider vinegar is a type of vinegar made from apples. Duh, right? More specifically, it’s fermented apple juice.
To make apple cider vinegar, apples are crushed and exposed to yeast. By doing this, the natural sugar from the apple is fermented over time and turned into alcohol (like you would do with wine). Sounds like making apple cider, right? Yeah, because the process is similar. The difference is the apple cider vinegar is fermented twice –once to make alcoholic cider and a second time to make it vinegar.