Comment by NoImmatureAdHom

Fun fact: a lot of people think artificial grape flavoring doesn't taste like grapes. And that the "Welch's concord grape jam" variety of jams is artificially flavored.

Nope, that's just what some grapes taste like. There's a Korean variety, and Concord at least. Wiki says it's this: https://en.wikipedia.org/wiki/Vitis_labrusca